Hi Beam Light on the dash

[jbrooks 15]

Hello, I have an issue with my either light switch or the HI Beam switch on the floor board, when i turn on my head lights and they are on low beam the HI beam light comes on the dash and when the HI beam lights are on the light on the dash go's off then back to low beam the dash light comes back on again!! do you any advice or have you run across this issue before and do you think the head light switch is bad? I do have a new one i was going to replace it with!! I was driving my car one night and out of the blue it just started doing the issue listed and has not stopped, there was a time where all of a sudden it reversed it's self but after a very short time it went back to work in reverse again. PLEASE ANY HELP WILL BE TRUELY APPRECIATED!!! 

 

THANK YOU

[Boss429Dreamer 18]

I would hazard to guess it's the headlight dimmer switch in the floor. But just my guess/opinion. I will follow this to see what fixes it. Good luck.

[Midlife 814]

High beams are green/black wires throughout the entire system.  The dash lamp lights up when power is applied to the green/black wires at the dimmer switch.  It's pretty hard to screw this up.  I suspect the problem may be a bad ground up front on the headlights, but I still can't fully explain your observations.

[Mach1 Driver 560]

on the schematic its pretty simple: 

on the wire diagram its looks like this, where it plugs into the circuit board:

Is the wire harness stock or aftermarket? Given your description, I don't think its up on the circuit board, but down at the dimmer, with wire 34 connected to low instead of Hi. Its definitely not the light switch, and is miss-wired. 34= green/black stripe, 13= red/black stripe, and 15= red/yellow stripe.

This may also help, for a non-tach car its on pages 13 and 14 of this (The tach car is there too, just later on). Holler if you need more help: