69 Chevy interior light problem

[69CHEVYAustin]

Hello forum. I have been reading many posts, but I have not seen the answer or help to my particular problem. If there is a thread I will gladly just take the URL to it.

Problem: I just replaced the light switch because the interior lights were acting funny. However, the problem still is not fixed. I'm almost sure I have a ground problem but I do not know where to search. There are times when the gauge/radio illumination lights work when things are "in the right spot". I took a multimeter to the switch to check for current. I would assume that the "dark Green" wire would show variable voltage when it is turned to different positions, however it only sometimes reads any voltage at all and I know all power in is good (from multimeter). I can easily see how the switch could/would be bad, but I had the exact same problem with the old switch, so I am thinking the problem may be a ground somewhere else in the connection.

I will be happy to answer any questions and provide any information. I look forward to the advice I will receive.



p.s. I will do an introduction thread tomorrow, I just wanted to post this ASAP some I can get some eyes on. Thanks

[Wrenchbender Ret]

The switch itself must be well grounded to the dash.

[69CHEVYAustin]

I will check that today. Is there anyway to add am extra ground? I get these readings when it is installed.

[69CHEVYAustin]

After using a wire to check and make sure I had a ground from the switch to the cab, I am still getting the same result. I have a new switch on order because I can read all the power going in and out except at that one terminal.

[Wrenchbender Ret]

OK. When you said interior lights I thought of dome lights. If the problem is dash lights it is possible the inst. panel ground is not good.

[69CHEVYAustin]

Problem has been resolved. When I put the multimeter on the switch and was getting power in and not out I figured it had to be the switch, but I wasn't trying to jump the gun since it was the second one I had purchased. Turns out it was faulty. New switch in and we are as good as new. Thanks for the input guys. I'm waiting on a day where I can get the truck cleaned and take pictures for my post. I will for sure be on her often.