Need a little more help here. Have my problem figured out, bad NSS. Now, I have the old one bypassed so I can still drive the rig, but am having problems finding a replacement. No shop or dealer in town can get one. Found them readily available on e-bay, ordered one up and the connector was wrong. The original has 6 wires and a larger plug, new one has small plug and 4 wires. All my search for 89 with 351/C6 has returned the same four wire plug connector. Am I missing something? Is it possible it has electronic shift? I didn't think it was an option for a 89 C6. Thanks for the help!
Installation in an 89 C6 (pics are gone); "...I have another thread about this, but it is unorganized and way bigger. The Nuetral safety switch goes on the outside of your tranny and detects which gear you are in and only lets you start the car if you are in nuetral or park. It it wired between the starter relay and the starter switch. It is located on the drivers side of the transmission where the shift lever and the downshift cable attach. I actually had to get a 90 NSS from the parts store so maybee I had a late production 89. I had to odrer mine from advance auto parts because Napa did not have it. I got a Borg Warner Design part
, I am not impressed with the quality but if it fails I can easily repalace it. Here is the old one and new one side by side. You can see how the epoxy sealer has seperated all the way around the edge in the old one. Removing it should take no more than 5 min. There is a little bolt at each end and one nut in the middle the nut is the hardest thing. You have to immobilize the lever attached to it in order to get the nut off. When put it back in you are supposed to adjust it but I just put it in the middle and it works for me..."
Source: by Mad Dog Tannen at FSB
Installation in an 89 C6 (pics are gone); "...It probably took me a total of 5 minutes to change this part. As you can see in the pic it has two bolts holding it on and one nut holding on the downshift lever. the hardest part is the downshift lever has to be immobilized while you loosen the nut. You can do this with a screwdriver like me or the book says to use a guage rod or something. You can get to it on the drivers side of the tranny. Here is a pic of it installed..."
Source: by Mad Dog Tannen at FSB
also, not for your year, but why some are 4 pin and other have 6 pins
Neutral Safety Switch (also referred to as Park/Neutral Position (PNP) & Back-Up Switch) Info & Part Numbers for an 88 C6; "...Ford used the electric Push Button Wiring in Broncos for about mid-year 87 for both the push button and manually shifted transfer cases. So the Push Button NSS is used in the manually shifted cases, but only 4 pins out of the 6 are used; the other 2 pins are used in the Push Button transfer case for Electric Shift Control Module and not used in the manually shifted cases; 6 PINS, STANDARD MOTOR PRODUCTS Part #NS92..."
Source: by miesk5 at Ford Bronco Zone Forums
Switch - Neutral Safety / Backup Lamp
NS-92 w/ 3 Speed Trans.; w/ Electronic Shift transfer case
Connector Gender Female
Maximum Vehicle Quantity 1
Number of Electrical Connectors 1
Number of Terminals 6
Number of Wires 6
Terminal Gender Male
Terminal Type Pins
NS-29 w/ 3 Speed Trans.; w/o Electronic Shift transfer case 4 pin
NS-54 w/ 4 Speed A.T.; Incl. Backup Light Switch; 4 Pin
NS-93 NS-93 NS-93 w/ 3 Speed A.T. 6 Pin
Neutral Safety Switch (also referred to as Back-Up Switch) Wiring Diagram (Partial) & Color Codes in an 89 5.8 C6; "...The lights in the back you are asking about are called Backup lights. A diagram of the circuit is attached. Do you have a volt meter? If you do, then turn the key to run and place the transmission in ® reverse. At the lamp socket check for 12 volts, (run a jumper lead all the way to the battery (-) rather than depending on the body metal for your ground). If you have 12V at the center contact in the light socket, you have ab ad ground. If you do not have 12 volts at the center contact of the light socket, go back to the Pink with black stripe wire at the transmission switch. If no 12 volts there check the other side of the switch (purple with orange stripe). I think you get the idea. When you get 12V the problem is between that point and the lamp socket. It could be either a corroded contact in a connector, a broken wire or the switch. I did not include the fuse because it also provides power for the turn signals..."
Source: by Ford via Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums