Bach Up lights Switch

[gmc396]

I have a 1968 GMC C2500 with a 396 and 4 speed granny on the floor. After replacing bulbs, it appears the back-up lights switch needs to be replaced. Do I get at the switch from the cab? I have a rubber mat on the floor. If I pull that out, will I be able to reuse it? I can't tell if it is glued in place.

Thanks for any advice you can give.

['68OrangeSunshine]

Have you tried to get at the switch from underneath the truck?
That's how I got to mine.
It would be alot easier to reach from the top if pulling the seat, floormat, gear-shift lever, and transmission hump, were not involved. My reverse switch plug was not on properly, after a clutch change. It only needed to be firmly seated.
I had a backup light with audio alarm, I swapped for the normal 1157 bulb. When I heard it shriek, I knew the contacts were good.

As for the rubber matt, they don't make them as well as they did 50 or-so years ago. An old one won't survive the operation, and I wouldn't trust even a recent repop matt. Probably will need a new matt if you decide to open up the hump panel.

[gmc396]

I looked at it from underneath but it looked tight. If you got it from there I'll give it another go.

Thanks!

[saxart]

This thread should have all of the info you need. (Even a part # for the new switch)

http://67-72chevytrucks.com/vboard/s...d.php?t=598355

['68OrangeSunshine]

Originally Posted by gmc396

I looked at it from underneath but it looked tight. If you got it from there I'll give it another go.

Thanks!

I was an Avionics troubleshooter [aircraft electrician] on the AV8A Harrier, the old British model, back when I was in the Marines. I had to learn to operate in some tight quarters. Sometimes, the compartment was so cramped I couldn't see what I was working on and also have my hands on the thing. I used a feel-by-Braillle system. If I knew what something looked [or felt] like when it was right, I could do it with my hands. Only ''seeing'' it in my mind's eye.
This is a left-handed-3-finger reach, if anything. But not all the man-hours associated with pulling the center hump.
Good luck.

[Steeveedee]

Originally Posted by '68OrangeSunshine

I was an Avionics troubleshooter [aircraft electrician] on the AV8A Harrier, the old British model, back when I was in the Marines. I had to learn to operate in some tight quarters. Sometimes, the compartment was so cramped I couldn't see what I was working on and also have my hands on the thing. I used a feel-by-Braillle system. If I knew what something looked [or felt] like when it was right, I could do it with my hands. Only ''seeing'' it in my mind's eye.
This is a left-handed-3-finger reach, if anything. But not all the man-hours associated with pulling the center hump.
Good luck.

I worked as a mechanic for many years, and at times I think that my fingers had eyes, some of the things I've installed by mind's eye!

BoT, on that note, hose the bottom of the truck off thoroughly. Another reason I installed some parts with my eyes closed was because of the grit. Farm implements have a special kind of dust that gets everywhere. We used to steam clean tractors before we worked on them. Fuel, oil and dust make a real cement to work past.