Reverse lights not working, reverse light switch location?

Good morning.

I attached a wire diagram for you to view.

There is a fuse in the smart junction block. Fuse number 20, a 10 amp fuse, should feed the circuit. It is hot with the key on. Use a test light to verify power on both sides of the fuse.

Do you have a stick shift or automatic transmission?

Roy

Leave the bulbs in their sockets, then check for voltage on both terminals. If the twelve volts is gone, I will explain why a test light would be more accurate than a voltmeter. If you find twelve volts on both terminals, the ground circuit is open. Look for a cut wire, rusted ground connection on the body, or the ground wire is corroded off the socket.

Cannot diagnose it without voltage measurements. Perhaps you can poke your test probe alongside the wires where they go into the socket. I assume you have the newer 3157 bulb with the flat plastic base. There is usually enough of the wire terminals exposed to allow readings to be taken right on the base of the bulb. For the older 1157s and 1156s, the round brass base was the ground terminal, and enough of that was exposed to allow readings to be taken. Those also had a common problem with the center terminal in the socket getting hot, and the plastic insulator would melt, then the terminal would sink away from the bulb and lose contact. Adding a drop of solder to the terminal on the bottom of the bulb often solved that.

Hi there,

It is on the top left side of the transmission.

Mark (mhpautos)

Please let us know what happens.

Cheers, Ken

Check the reverse position switch on the side of the trans. It's on the driver side to the rear. It should be the smaller of the two sensors. The other is the Neutral safety switch.

Is the reverse light switch on the trans any good? Have you checked that switch? If not then I would and if you need any help with wiring colors and what they do then get back to me and I will look over the wiring diagrams and get that info for you. Let me know how it goes and what you need.

It is very easy to replace just unplug remove and replace and plug back in. If you still have problems then I will look over the wiring diagram and walk you though some testing. If you would like to test it first then let me know and I will walk you through it first to make sure it is bad. Let me know what you want to do.

John, on a automatic it is your neutral saftey switch, follow your gear selector linkage to your tranny, Where your gear selector goes into the tranny is where your switch is, it should have two bolts that hold it in. On a manuel, I believe it is on top of the tranny, closer to drivers side about half way back. Hope this helps.

Sounds great. Let me know it goes and if it still don't work I look through the wiring diagrams and we will do some test.
N. Idaho