I have a 1990 F250 5.8L 2WD with a 5 speed manual. Reverse lights will not come on, ruled out bulbs and fuses. Pretty sure it is the reverse light switch. Can anyone tell me were it is located on this truck????

Thanks!!!

 

I'm going by memory here, but I think driver side of the transmission, near the front.

 

Thanks!!! I will do some searching and see what I can find.

 

It's #72 in this diagram

 

That diagram is for the Mazda, he has a ZF.

This is correct. It will have 2 wires going to it, so the harness is small. When you unplug it, the switch is red, at least mine is.

 

For the ZF tranny it's in about the same location, same side as shown above.

I'm having problems not with the switch itself but with the connector that mates to the switch - it is a poor-quality design at least on my 1990 truck - molded rubber, and the terminals inside appear clean, but do not make reliable contact with the switch any longer. I can usually wiggle the connector to get the lights to work, but of course that is not viable while driving!

 

I got that connector with 6" or so wire attached from napa. Splice to your harness and problem solved.

To the OP, the switch is up pretty high on the drivers ft of the trans, really hard to see if the wires arent connected to it like mine was. IIRC the wires going to it are red with a blue stripe. The harness comes up to a connector under the master cyl. You can check for voltage and continuity at that connector a lot easier than at the switch itself.

 

Are we sure about that? My 1990 F250 had an M5R2 in it. Mine was a 5.0 but the bellhousing is the same and i've never heard any conclusive info on what the cutoff was for the M5R2 other than it never came in an F250 which is wrong. I had to replace the reverse switch on mine as well.

 

The deciding factor is the fact of whether or not it was a LD/HD F-250...

LD-M5
HD-ZF......

 

Great thanks for the diagram and calling out wire colors it will really help tracking it down. Now I have an excuse to crawl under truck and hide from family during Thanksgiving!!!!!!!

 

I think this is more of the case....

 

Found the switch per the diagram. Turns out my tranny is the ZF. Connector looks worse that the switch going to replece them both hopefully that does the trick. Thanks again for the help!!!