The Stovebolt Site Forums The Shop Area The Electrical Bay need backup lights to go on when in "R"

I replaced all the old wiring and lights, with all new ones from American Classics thinking it was the old wiring, replaced the Backup light-safety switch
'cause it was toast.Re-wired the headlight switch so the parking lights are on at the same time the headlights are on. What am I missing?
Many thanks in advance.

Adramelech,

I'm not 100% clear on the problem. You have a '66 GMC and you can't get the backup lights to come on when you put the truck in reverse.

I don't think you have to have any other light on for the backup light to function. They have there own circuit..they don't go through any other switch, only the switch that closes when the rig is put into reverse.

Does this truck actually has separate backup light?? You haven't mentioned what type of transmission you have, automatic or standard.

You say you have replaced the reverse backup switch. If you have a circuit tester, you need to verify power on the line side, then verify you have switch closure with power on the load side.

If these prove good, I think the search would be on for broken wires or wires to the wrong place.

Make sure the bulbs are OK and the lights have proper grounds. With a little inexpensive circuit tester, this should be pretty easy to troubleshoot. Good luck and keep us posted on your progress.

Stuart

Missing?What was the orignal problem?Do the signals work?Need more info.

I basically took all the original wiring and replaced it with new ones, from the firewall back.
It did not look like it had a separate back-up light.
It is an auto trans.
The brake, and turn signals work.
I'll do the circuit tester.
Will keep you guys posted.

If it doesn't have a light, why would you expect it to work? Or did I miss something?

Sorry to have caused confusion.

I thought I was being asked by atomarc if it had a separate back up light meaning: wiring.

I think I have all the wiring needed for the back up lights to work when engaging in reverse.

Can somebody point to a wiring diagram that shows what goes where in the back of the 66 gmc wideside?

Looks simple enough but you never know.

Hey jcf,Check your power with a test light at the back and work your way forward.Light green is back up wires,Dark green is right signal/right stop light,Yellow is left signal/left stop light,Brown is tail lights,Black is ground.An Orange or Red 10 gauge wire is trailer brakes if you have a trailer package.Take your time and let us know how you make out.

first, i would like to thank...the academy, just what you would expect from lala land, seriously thanks guys, it was the back up light safety switch i did not have it lined up right in the steering column so it was not making contact when in "R" thanks to all this i have brand new wiring from the firewall to all my back :rolleyes: lighting(feh!)

LMAO!!!! That sounds exactly like something I would do. That's why I stck to carpentry work and let Homer do the more complicated stuff.

I had a 73 Van one time which I decided to completely redo the fron brakes with all-new parts.

I got it all put back together but couldn't get any brakes.

I took it to my at-then mechanic about a quarter mile away. He very reluctantly agreed to take a look at it since I had started it.

After informing me that I had put the calipers on the wrong sides, he advised me to stick to drinking beer and ridng my lawnmower, both of which he new I had ample expertise in.

He was puzzled about exactly how I managed to get the calipers on backwards, as that's not s'posed to be possible.

Davey

I had a mechanic (at a shop I trust) put my calipers on upside down one time. Needless to say, I wasn't happy.

Hey, I don't feel so stupid now. At least I don't claim to be a mechanic.

Davey