'89 Bronco alternator problems and I have searched - FSB Forums
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 22 (permalink) Old 08-08-2005, 04:23 PM Thread Starter
Registered User
 
Join Date: Jun 2005
Location: Fairview, TN
Posts: 50
'89 Bronco alternator problems and I have searched

I'm kind of new here, but I do a lot reading and searching my problem. I have searched read the problems and got a lot of information, but I have not found enough or the right information to solve my problem.

I understand how the alternator works. I have a new alternator (checked 3 times, autozone, Local parts store and alternator shop) and it is good and working properly. I have 12.5 volts with the engine oof start the engine I have 12.1 volts running at idle. It does not increase to recommeded volt to charge. I used the a VOM to chek coming from the alternator, checked coming from the switch to th alternator (7-9 mV). I haved cleaned all the conectors to the starter solenoid, replaced the alternator harness with new connectors, the harness made with new wires and fuse wire link. I checked the volt meter. the only thing i can think that I don't see working is the battery indicator light is not working. Possibly my Problem!!! The battery cables are in good condition and I have cleaned the ends and terminals on the battery.

everyone is going to say to go to the 3G, but I had rather deal with this problem first to deal with the problem at hand.

Is there a way to bypass the switch to get the alternator charging. the engine starts and runs perfect right now.

Any help would be greatly appreciated.

Thanks in advance,

Phillip KB4I
Fairview, TN
KB4I is offline  
Sponsored Links
Advertisement
 
post #2 of 22 (permalink) Old 08-08-2005, 04:38 PM
I got tools-i can fix it
 
Join Date: Jul 2004
Location: Carmichael, California
Posts: 2,737
Bronco Info: 1983 Full Size Bronco
12.1 is low it should be higher. did you replace the regulator? the reason so many say goto 3G is it is cheaper in the end to do the swap than keep throwing parts at a known issue. the stock alt is not enought to handle what we need if you add anything to the system. you can junk yard a 3G for $15 and get new wires for under $20 and a mega fuse and not have issues or fix what you have and find you do not have enough power to do what you want and need to do the swap anyway.....mike
collinsperformance is offline  
post #3 of 22 (permalink) Old 08-08-2005, 05:20 PM
I ♥ TTB
 
Weber's Avatar
 
Join Date: Jan 2004
Location: Central Oregon
Posts: 3,918
Bronco Info: 89 lifted a smidge
What tests did they do on your alternator? I'd check my voltage regulator...

Quote:
Originally Posted by Broncogirl89 View Post
Well try snatch next time.
-In Heaven you get love and peace.


In Hell you get to party with Pirates and Ninjas.
Weber is offline  
post #4 of 22 (permalink) Old 08-08-2005, 06:29 PM
Registered User
 
k1w1t1m's Avatar
 
Join Date: Nov 2003
Location: Bentonville AR
Posts: 1,031
Bronco Info: 2000 Nissan Xterra
Some vehicles (not sure if Bronco is one of them) have to have the charging light working. It is how the alternator does it's voltage or current sensing.

Fix the light and you may have fixed the problem.

HTH

Tim

2000 Nissan Xterra 4x4

Sold91 351 e4od on 32" BFG ATs, Warn freewheel hubs, otherwise out of the box

http://www.geocaching.com
k1w1t1m is offline  
post #5 of 22 (permalink) Old 08-08-2005, 10:29 PM Thread Starter
Registered User
 
Join Date: Jun 2005
Location: Fairview, TN
Posts: 50
Re: Bronco

Like I said I had the alternator checked at 3 diferent places including a professional alternator shop. The alternator tested fine at all 3 places.

No offense, but the 3G is not going to work either if the regulator isn't getting activated by the switch. I may be wrong. I will eventually do the 3G

I had the same problem with a CJ-5 that I had when I put a GM one wire alternator. I simply had a wire that was wired to a switched positive wire and it charged. Seems to me that this alternator should work the same way if a positve switched wire was used to activate the alternator.

I also read somewhere in the forum were someone else had the same problem and they did the switched wire and it started charging. Plus I also read somewhere that it would not charge if the light was not lit.

Sometimes I read too much.. So that is the reason for the question. You can't learn anything if you don't ask questions. like I said I did seach the forum and will continue searching till I find my solution.

thanks to all that have made suggestions so far.

Thanks again,

Phillip KB4I
KB4I is offline  
post #6 of 22 (permalink) Old 08-08-2005, 10:51 PM
Registered User
 
k1w1t1m's Avatar
 
Join Date: Nov 2003
Location: Bentonville AR
Posts: 1,031
Bronco Info: 2000 Nissan Xterra
Have you checked the circuit for the battery light yet?

2000 Nissan Xterra 4x4

Sold91 351 e4od on 32" BFG ATs, Warn freewheel hubs, otherwise out of the box

http://www.geocaching.com
k1w1t1m is offline  
post #7 of 22 (permalink) Old 08-08-2005, 11:02 PM
Registered User
 
k1w1t1m's Avatar
 
Join Date: Nov 2003
Location: Bentonville AR
Posts: 1,031
Bronco Info: 2000 Nissan Xterra
(Quote)Plus I also read somewhere that it would charge if the light was not lit. (Quote)

Sorry I didn't read it well enough.

I would double check that though.

2000 Nissan Xterra 4x4

Sold91 351 e4od on 32" BFG ATs, Warn freewheel hubs, otherwise out of the box

http://www.geocaching.com
k1w1t1m is offline  
post #8 of 22 (permalink) Old 08-08-2005, 11:10 PM Thread Starter
Registered User
 
Join Date: Jun 2005
Location: Fairview, TN
Posts: 50
Alternator

Too quick to type.. It should have read will not charge if the light is burnt or out.

I haven't checked the the light just yet. I teach school during the day and coach Boys and girls golf in the afternoons after school. sometimes I don't home before 8 in the evening and ready to check the pin holes in my eye lids.

Phillip KB4I
KB4I is offline  
post #9 of 22 (permalink) Old 08-09-2005, 03:43 AM
OUT OF BUSINESS / M.I.A.
 
Fireguy50's Avatar
 
Join Date: Apr 2003
Location: Michigan
Posts: 11,482
Bronco Info: rusty
+12 volts to the grn/red wire will bypass the charge light

Ryan McCormick


Fuel Injection Technical Library
Parts replacement is not auto repair, if you canít diagnose, donít open the hood!
Fireguy50 is offline  
post #10 of 22 (permalink) Old 08-09-2005, 12:09 PM
Back in TEXAS
 
87EBBronco's Avatar
 
Join Date: May 2005
Location: San Angelo, TX
Posts: 1,967
Bronco Info: 87 Eddie Bauer 5.0/C6/BW1356
I'd check/change the voltage regulator. Had one go bad on a K5 once. When I checked it I had 13.4 volts so I took an alternator for a test. Alternator tested fine. Was told that it was my voltage regulator so I put my money where his mouth was. After replacement 13.6 volts and the problem was gone. I still don't know why .2 volts made that much difference but it did. That was checking at multiple places, into the VR, out of the VR, and at the battery.

Mike
My Super Motor's Link
87 EB, EFI 5.0, C6, Manual 1356, 32x11.50Rx15 Buckshot Mudders, Ravin exhaust, 9mm Ford Racing Wires, KN filter, Yukon 31 spline axles, Uniden 510 Pro CB



"Do not meddle in the affairs of dragons, for thou art crunchy and taste good with ketchup!"
"The difference between fiction and reality, fiction has to make sense" Tom Clancy
87EBBronco is offline  
post #11 of 22 (permalink) Old 08-09-2005, 12:36 PM
Southeast Utah Native
 
Rick3373's Avatar
 
Join Date: Jun 2003
Location: Moab, UT
Posts: 965
Bronco Info: 89 XLT
If it's the regulator the alternator tests should've identified it, the regulator is internal to the alternator. One other thing you haven't mentioned is did you have the battery checked? It could be going bad & not taking enough of a charge to get above the 12v you're reading. If the battery checks out good try disconnecting everything from the starter relay & reconnecting one wire at a time with the engine running to see if any of them cause the voltage to drop. This will eliminate those possibilities if nothing else.

LIFE'S SHORT, PLAY DIRTY!
89 Bronco XLT, 351, C-6.

Understand how your use affects the land.
Adopt minimum impact practices.
Share in the costs of services, education & maintenance.
Rick3373 is offline  
post #12 of 22 (permalink) Old 08-09-2005, 02:26 PM Thread Starter
Registered User
 
Join Date: Jun 2005
Location: Fairview, TN
Posts: 50
Re Bronco alternator

The battery was checked at the same 3 places the alternator was checked. Everything checked good. I will go back for the 3rd time and check the voltages on all the wires.

Phillip KB4I
KB4I is offline  
post #13 of 22 (permalink) Old 08-09-2005, 09:57 PM
Registered User
 
BigBroncoXLT's Avatar
 
Join Date: Oct 2003
Location: Smyrna Tennessee
Posts: 3,243
Bronco Info: 1985 XLT
Wow, I know people in Fairview! Welcome to FSB, from Columbia.

Jeff

Jeff
The Alpha Male Mobiles
88 Bronco XLT 4" superlift, D44 SAS, 8.8 rear, 33.12.50 BFG MT's 302/AOD/208 SOLD
http://www.supermotors.org/vehicles/...il.php?id=4849
85 Bronco XLT 2.5" rough country lift 351W/C6/208 9" rear TTB up front.
http://www.supermotors.org/vehicles/...il.php?id=9181
Quote:
Originally Posted by MANNY
I love when i can play with my stuff.
BigBroncoXLT is offline  
post #14 of 22 (permalink) Old 08-09-2005, 11:17 PM Thread Starter
Registered User
 
Join Date: Jun 2005
Location: Fairview, TN
Posts: 50
Thanks Jeff. Seems to be a great bunch here. I have been involved with other forums (CK5, southern Jeeps and others) but this group seems to be one of the friendliest and most willing to help than most. This is my first Bronco so i got lot to learn about them. I've had a S-10 Blazer 4 X 4, '83 K-5 blazer with 6.2 diesel with 6 inch lift and '73 Jeep CJ-5. I am pretty proficient in mechanics growing up a farm in Chapel Hill, Tn and then Transplanted here in '79 where I presently teach Agriculture. I don't wheel any more just trying to get a '89 Bronco together for a Daily Driver since I'm only 2 minutes from the high school. I have access to one of the 21st century automotive shops in Tennessee schools, plus I have all sorts of metal working equipment in my own shop at school where we do a lot of mechanic work with small engines and farm tractors and etc. Our basic curriculum is Horticulture but I still sneak in a lot of hands on experince in the mechnical area.

I'm getting ready to put in a slave cylinder and new clutch and pressure plate in the Bronco in a couple of weeks. I figured since I was replacing the cylinder, I might as well do a clutch install at the same time.

I plan to become a member of the Fullsize family as soon as I can my cash into the guys. I guess I am already a fullsize wannabee, hey I got a Bronco.

Thanks again for the welcome,

Phillip KB4I
Fairview, Tn
KB4I is offline  
post #15 of 22 (permalink) Old 08-11-2005, 09:14 PM Thread Starter
Registered User
 
Join Date: Jun 2005
Location: Fairview, TN
Posts: 50
Well, I still haven't fixed my problem with my alternator but I did score two 3G alternators today. I had a doctor's appointment and had about 2 hours to go back to work, Since they were going to charge me for a full day anyway, I thought I would go home a different way. I found a used car and salvage yard onwed by some Pakistanians, so I turned around went back, I asked for an alternator for a '95 mustang GT. and they had 2. I gave $20 bucks a piece for them. I still had enough time to take them to an alternator shop that I use and they both tested in good shape. I had enough time to go a friend of mines Stereo shop and he let me go through his scrap box and scored 10 feet of 1 gauge negative cable and 10 feet of positive cable coneectors and such. He said I could have what found . Big mistake. I hit some what cable lotto.

So I guess you guys talked me into the conversion.

thanks to you all,

Phillip KB4I
KB4I is offline  
post #16 of 22 (permalink) Old 08-12-2005, 12:24 AM
Registered User
 
BigBroncoXLT's Avatar
 
Join Date: Oct 2003
Location: Smyrna Tennessee
Posts: 3,243
Bronco Info: 1985 XLT
I used to live in Franklin..but I know a bunch from fairview and chapel hill(the tractor pull has gotten outrageus hasnt it?) I need to go searching for a couple 3G's myself since my wifes Taurus has started to develope a whine in the alt and my broncos alt sucks major..

Jeff

Jeff
The Alpha Male Mobiles
88 Bronco XLT 4" superlift, D44 SAS, 8.8 rear, 33.12.50 BFG MT's 302/AOD/208 SOLD
http://www.supermotors.org/vehicles/...il.php?id=4849
85 Bronco XLT 2.5" rough country lift 351W/C6/208 9" rear TTB up front.
http://www.supermotors.org/vehicles/...il.php?id=9181
Quote:
Originally Posted by MANNY
I love when i can play with my stuff.
BigBroncoXLT is offline  
post #17 of 22 (permalink) Old 08-13-2005, 09:13 PM Thread Starter
Registered User
 
Join Date: Jun 2005
Location: Fairview, TN
Posts: 50
R$E : Alternator Problem

Quick update On Alternator problem. I removed the alternator and replaced with a 3G today. I still don't have 12 volt power on the green and red striped wire that turns on the regulator. I did take a wire and semi-spliced into the green-red striped and hooked it to the positive post of the battery and Wallah, the alternator started charging and actually had indication on the voltage meter. So I'm still trying to figure out why I'm not getting 12 volts on the wire. It may still be that the bulb is out.

Next question. How do get the Instrument cluster out so that I can check the bulb to see if it needs replacing?

Is there a wire on the passenger side that is switched so I can keep the alternator charging when the key is on and off when the key is off?

Would it be possible to go from the fuse box from a switched circuit to go to the alternator.

I really need to get his thing going.

I forgot to mention that I did the Ghetto fab K & N FIPK also. Great information on the site

Another question. My pipes going to the filter have a wire like sping inside. I know this is probably some type support for the pipes. Do I need to remove the wire from the pipe?

Next project: Slave cylinder and Clutch. Then Electric fans.

Thanks,

Phillip KB4I
KB4I is offline  
post #18 of 22 (permalink) Old 08-14-2005, 12:53 AM
Registered User
 
BigBroncoXLT's Avatar
 
Join Date: Oct 2003
Location: Smyrna Tennessee
Posts: 3,243
Bronco Info: 1985 XLT
What year is your rig Phillip?
Jeff

Jeff
The Alpha Male Mobiles
88 Bronco XLT 4" superlift, D44 SAS, 8.8 rear, 33.12.50 BFG MT's 302/AOD/208 SOLD
http://www.supermotors.org/vehicles/...il.php?id=4849
85 Bronco XLT 2.5" rough country lift 351W/C6/208 9" rear TTB up front.
http://www.supermotors.org/vehicles/...il.php?id=9181
Quote:
Originally Posted by MANNY
I love when i can play with my stuff.
BigBroncoXLT is offline  
post #19 of 22 (permalink) Old 08-14-2005, 01:03 AM
scrounger extrordinaire
 
axaviere's Avatar
 
Join Date: Feb 2003
Location: The Land of Oz
Posts: 5,269
Bronco Info: 79 460 6" coming soon...39.5s, D60/D60 ARB/Detroit w/ 4.88s
you are saying, just to be clear, that you are not getting 12v at the green/red wire when the key is on? are you checking before the regulator?

take a look at TRUCK my 79 custom. 6" front, 4" rear, 460, 37s, 8 lug conversion. F&R discs. this season, i will have the D60/D60 installed, rear detroit and front ARB with 4.88s and 39.5 IROKs on hummer double bealocks, hydro assist and crossover steering
axaviere is offline  
post #20 of 22 (permalink) Old 08-14-2005, 09:37 AM Thread Starter
Registered User
 
Join Date: Jun 2005
Location: Fairview, TN
Posts: 50
RE alternator

It's a '89 302 with 5 speed manual no A/C.

and yes to the question before the regulator. The alternator is a 3G with internal fan and internal regulator.
KB4I is offline  
Reply

  FSB Forums > Bronco Discussions > Noobie Bronco Tech Questions. Flame free zone!

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the FSB Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself. DO NOT USE Gmail.com accounts. If you only have a Gmail.com email please contact the administrator here

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome