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Horn Relay Location?

43872 Views 18 Replies 9 Participants Last post by  Alvin in AZ
My horn, and cruise both cut out and I figured its the relay. Only problem is I can't find the relay:banghead. Autozone repair guide says on the dash support but I cant find it. If it makes any difference I have electronic locking hubs and its a 1989 Bronco Eddie Bauer.

Thanks for any help.
Mike
1 - 19 of 19 Posts
My horn is not working either....so I'm interested in this too.
yo!
Relay Location in an 89; "...under the middle of the dash, but it's probably not the older metal 3-terminal relay attached to the cruise module; it looks more like the FP relay. If that's what you have, I suggest you chop it (& the FP & EEC PWR relays) off and replace it with a Bosch/ISO...But remember that it's possible for your horn relay to be working perfectly & the wiring or the horns themselves could be bad..."
Source: by Steve83 (Steve, That dirty old truck) at Ford Bronco Zone Forums
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92-96 Horn Relay is in da Power Distribution Box (PDB); here is the PDB Diagram in a 96, sim to a 95; the PDB is Located under the hood on the drivers side fenderwell, behind the stock air cleaner location..."
Source: by Ford via Roadkill (The Beast) at SuperMotors.net


See Relay #3

you can swap it temp w/da FP relay to verify where it is good/...check for corrosion..
could be other problems along ckt.
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After searching and reading several posts on this subject, I figured my horn not-working problem (as well as my airbag dash light blinking problem) was related to having to replace the airbag clock spring on my 95 FSB. The PO also mentioned he thought the clock spring was an issue as well. So, I replaced it.

As soon as I had it all together, the airbag light stopped blinking (good news) and the horn worked (more good news), but the horn only worked one time (not such good news). Now the horn does not work. I am puzzled.

I thought there would be a fuse I could check, but I cannot find any fuse related to the horn in my dash fuse box.

Suggestions and comments are welcome !
yo BBL;
In my 96, whcih is = to your 95; the Horn Relay Fuse is also in da Power Distribution Box (PDB);

Fuse Position Amps Circuits Protected
1 20 Radio
2 30 4WABS Relay No. 1
3 30 Horn Relay, Daytime Running Lamps (DRL), Multi-Function Switch, Speed Control
4 25 Trailer Marker Lamps Relay, Trailer Backup Lamps Relay
5 15 Heated Oxygen Sensor (HO2S), Backup Lamps, 4WABS, Trailer Battery Charge Relay, Daytime Running Lamps (DRL), Speed Control
6 10 Trailer Right Stop/Turn Lamps
7 10 Trailer Left Stop/Turn Lamps
--

Maxi-Fuse Position Amps Circuits Protected
8 30 4 WABS Relay No. 2
9 30 PCM Power Relay, Powertrain Control Module (PCM)
10 20 See Fuse 18 (IP Fuse Panel), Starter Relay
11 — Not Used
12 (Diode) 20 Ignition System, PCM Power Relay Coil
13 50 See Fuses 5, 9 and 13 (IP Fuse Panel)
14 30 Rear Window Defrost
15 50 See Fuses 1 and 7 (IP Fuse Panel) and Fuse 5
16 20 Fuel Pump Relay
17 50 See Fuses 2, 6, 11 and 17, Maxi-Fuse 22 and Circuit Breaker 14
18 30 Trailer Battery Charge Relay
19 40 Main Light Switch, Headlamps
20 50 See Fuses 4, 8 and 16 (IP Fuse Panel). Also See Circuit Breaker 12.
21 30 Trailer Electronic Brake Control Unit
22 20 Diode Current Flows from Fuse 22 to PCM Power Relay
Relay 1 Relay PCM Power Relay
Relay 2 Relay Fuel Pump Relay
Relay 3 Relay Horn Relay
Relay 4 Relay Trailer Marker Lamps Relay
Relay 5 Relay 4WABS Relay No. 2

For a better view of the Diagram & Listing see;
this is from Diagram in 96 Bronco & F-Series
Source: by Ford via thedieselstop.com @ http://www.thedieselstop.com/faq/9497faq/maint/stj/stji1002.htm

and a PDB Diagram in a 93; Click next to see the Diagram
Source: by Bronco Rob at SuperMotors.net http://www.supermotors.net/registry/media/290853

I know that earlier years did have a horn fuse in the cab fuse block
Also, check the cab fuse block cover; inside for a diagram as well bec sometimes Ford made changes and their on-line diagrams don't match up well w/ the cover's diagram
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For an 89 with cruse it will be almost directly behind the cubby to the right of the steering column. If you didn't have cruse you don't have a horn relay. Here's a picture of it unbolted and swung down around.



Adrianspeeder
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UPDATE: Stopped at Pep Boys and bought a replacement relay (as described above by Mierk5) and bingo ! Horn is now functioning.

Thanks much Mierk5 !

So, hopefully, this will help someother FSB owner in the futre.

Summary:
1. FSB is a 1995, 5.8L.
2. Airbag light was flashing on dash.
3. Horn didnt work.

Fix:
1. Replaced clock spring (note the clockspring is NOT the same for a 94 FSB as is the 95 FSB)
2. Replaced horn relay.

Gotta love this forum.
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For an 89 with cruse it will be almost directly behind the cubby to the right of the steering column. If you didn't have cruse you don't have a horn relay. Here's a picture of it unbolted and swung down around.



Adrianspeeder
Okay. Appereantly, my 89 model is a freak. It has cruise, doesn't work, but all of the parts are there, but, there is NO plug/block that looks remotely like what you have. The only plug under there that is unaccounted for is a black, flat one that has a thick grey, yellow, pink , and another one that I couldn't get a good look at. Any thoughts on this? I really would like to get the horn working factory style again. :whiteflag
yo
Good job BBL!
---
Next up...

Cruise Control & HORN Relay..etc.. wiring diagram for a '88.5 or '89 Bronco by Reptillikus (Project 4D2, Kevin W) at SuperMotors.net


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Cruise (Speed) Control (Vacuum) "TRICKS OF THE TRADE" Troubleshooting TSB 90-25-12 by Ford for 86-91 Bronco, Aerostar, Econoline, Explorer, F-150, F-250, F-350, Ranger & cars
Source: by Ford via miesk5 (Al) at Miesk5's Home Page of Big Bronco Links home.comcast.net
http://home.comcast.net/~miesk5/tec... Explorer, F-150, F-250, F-350, Ranger & cars
--------------

Lastly, but most important... Be Safe Adrian, and thanks!
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Didn't get this part in;
Mudhound; re: "...black, flat one that has a thick grey, yellow, pink , and another one that I ..."
That connector seems (a guessing) to be one that plugs into da CC Amplifier as shown in that wiring diagram by Reptillikus; it is shown in upper left corner.
bronco cruise control

i have a 95 bronco the cruise control will not work but the horn does work any suggestions on where to start or troulbe shooting ideas?
Well, now that I have this, HOPEFULLY I can get the horns working again shortly. I tend to agree that the black, flat plug going nowhere is msot likely the C/C amp missing, which would explain the C/C not working... I'll try and check tomorrow. Thanks to everybody for helping with this.
yo Mudhound,

ok, GL on it!
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mikey321
Was the recall work done on it?
If not; get it done Immediately!!!

Recall for 94-96 Bronco, 94-02 F-150, 97-02 Expedition & 98-02 Lincoln Navigators; NHTSA CAMPAIGN ID Number: 05V017000; Recall Date JAN 27, 2005 & Update; Field Service Action 05S28 Speed Control System Modification

Recall Update; Field Service Action 05S28 Speed Control System Modification Supplement #7 for 94-96 Bronco, 94-02 F-150/250 (Under 8500 GVW), 97- 02 Expedition, 98-02 Navigator, 02 Blackwood
Source: by Ford via Steve83 (Steve, That dirty old truck) at http://www.supermotors.net/vehicles/registry/media/505128_1

Recall; Fused Jumper Harness (14A411) pic; "List price on this is ~$11 (as of the date I posted the pic), but it will be installed at NO CHARGE (parts or labor) on vehicles covered by the recall. Even though the label is wrong about the fuse being internal, it should still NEVER be replaced. If it blows, it means the brake pressure switch is leaking, and (as the label states) should be replaced with the new switch & adapter harness kit, listing for ~$20 right now..."
Source: by Ford via Steve83 (Steve, That dirty old truck) at http://www.supermotors.net/vehicles/registry/media/505128_1

Call Dealer; have VIN ready

if done;
Troubleshooting Chart, Electronic Servo System in 93-96
Source: by Ford via Steve83 (Steve, That dirty old truck) at http://www.supermotors.net/registry/media/177061

Wiring Diagram in 93-96
Source: by Steve83 (Steve, That dirty old truck) at http://www.supermotors.net/vehicles/registry/media/322459


Inoperative; Short Circuits, Common Locations TSB 95-02-11 on 94-95 Bronco & Trucks (Fuse 13 Blown; ck the owner's guide & fuse block cover-inside for proper fuse# in your year)
Source: by Ford via Steve83 (Steve, That dirty old truck) at http://www.supermotors.net/vehicles/registry/media/470456_1

Pressure Switch Location pic in a 95
Source: by Trucky18 (Bco) at http://www.supermotors.net/clubs/superford/vehicles/registry/detail.php?id=3749&s=28297#content

see more info Links in my site under Electrical, Cruise (Speed) Control
Since horn works, rule out da Clock Spring
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it wasnt done that i know of but i contacted the dealer and they said it was not recalls for my vin number
If your horn AND cruise are not working, its most likely your clock spring. The way to tell is with the car off, press the horn button. If you hear a clicking sound from your passenger side dash, its clock spring b/c the relay is still working.

thought you might find this useful too
http://www.fullsizebronco.com/forum/showthread.php?t=62939
yo Smok3y!
Is that off 206?

Mikey's horn is working; he posted sim Q here in another topic.
yo Smok3y!
Is that off 206?

Mikey's horn is working; he posted sim Q here in another topic.
yea but I duno if the OP's horn is back working thats why i posted that up.


and no its off Route 70. Obviously you're located in south jersey. I'm gona Pm you about some stuff this way we aren't cluttering this thread with BS
hello, new to the forums but you guys have helped me before

i seem to be in the same situation as mudhound.

my cruise amp is missing and my horn relay clicks instead of the horn.

i see the 1 connector for the cruise amp but nothing for the horn (yel/grn yel/blu blue)

can i purchase a replacement cc amp?
what about the lack of horn connector?

any help is appreciated

edit '89 xlt 5.6
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yo!
Relay Location in an 89; "...under the middle of the dash, but it's
probably not the older metal 3-terminal relay attached to the cruise module;
it looks more like the FP relay. If that's what you have, I suggest you chop
it (& the FP & EEC PWR relays) off and replace it with a Bosch/ISO...But
remember that it's possible for your horn relay to be working perfectly &
the wiring or the horns themselves could be bad..."
Source: by Steve83 at Ford Bronco Zone Forums
Cool one Steve83 and thanks to both of yuh, Miesk! :)

Been wondering about those dangged Ford relays, had a few failures on
them. One failure has been them working when they wasn't supposed to.
Shut the door and the fuel pump would come one or hook up the meter
ready to check the IAC voltage and find voltage on it with the key off. :/

Bought some Bosch relays and pig-tailed-holders from Parts Express and
used them for my weird-assed dash mounted ignition switch rewiring job.
http://www.panix.com/~alvinj/file12/BroncoDash.jpg
So have been thinking about swapping out the relays under the hood too.

Oh, and x2 on the horn relay, you can see I don't have a horn button yet
but jumpering the wires I hear the relay under dash clicking but no horn. :)

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BigBroncoLuvr wrote:
"Gotta like the guys on this forum."
Reworded it to both give credit where it's due and not make it sound gay.
LOL :)

Alvin in AZ
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