My boyfriend is installing a new wiring harness in a 77 toyota pickup. Everything seems to be working fine except the Yellow turn signal indicator lights come on solid when brake is pressed. Any ideas as to what may cause this and how to fix it? Please help!

 

You have got a short some where. Probably in the steering column area. Bust out the test light and DMM..

 

thanks Here's to hoping he finds it before he loses his sanity lol

 

Mine was similar....the driver side rear blinker came on when brake was pressed, and blinker didn't work when the brakes were pressed either. I ran a new ground from the rear light assembly directly to the frame and it fixed my problem.<br />
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So, check the ground.

 

I've had the same problem before and ended up being a bad bulb talk about pulling hair trying to figure out