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#1
05-24-2021, 10:30 PM
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70' Firebird Electrical Issue - Dash Light/Signals
Looks like everything is working electrically, however when I pull my headlight switch to the On position my signal indicators on dash glow green.
The signals do not fire with headlights on, however they work fine when headlights are off. Hazards work fine with headlights on or off. The neutral safety switch wire was sheared off at some point if that matters. I have checked the grounds, not sure what it could be. Anyone have this issue? Thanks for your input |
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#2
05-24-2021, 10:33 PM
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I would think that would have to be a short somewhere
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Never hold your farts in.They travel up your spine, into your brain, and that's where you get sh!tty ideas from. |
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#3
05-25-2021, 06:42 AM
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I think it is usually a bad ground. The dash is notorious for not being grounded good enough.
I've seen where a bulb filament has melted and fused to the base of bulb and fed voltage back. With the light switch being the activation, check the connectors for it and the grounding. (I haven't looked at the wiring schematic so not sure how its setup) Forgot to add that the dimmer switch should be checked also. 
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#4
05-26-2021, 12:08 AM
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Black wire on the Harmonica to ground, check it for continuity. Check the actual harmonica tabs and the Electrical plastic template thats on the back of the cluster.
There is a metal grounding tab on the front between the cluster and the WW and headlight switch area. Be sure thats in place. |
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#5
05-26-2021, 12:25 AM
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Appreciate the replies. We've checked all mentioned. Does anyone have the 70' Rally gauge PIN electrical connector diagram and 70' PIN diagram for headlight switch? Trying to see if OER repo printed circuit and/or repo headlight switch is bad as well.
Thanks |
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#6
05-26-2021, 12:33 AM
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I will try to dig up my schematic tomorrow. I have seen bad 4 way flasher in the turn signal switch cause this same symptom.
maybe the dimmer, but I lean to steering column. |
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#7
05-26-2021, 07:00 AM
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Might try a different turn signal flasher also.
Here are some links: Dash pic 70 Bird Wiring 70 Bird Wiring 1 70 Bird Wiring 2 
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#8
05-27-2021, 05:58 PM
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Thanks for replies. Signals now work with lights on. Redid all grounds, replaced dash bulbs with correct 194 bulbs, and reinstalled the firewall to passenger cylinder head ground strap.
Redone aftermarket HEI compatible tach fried although it was correctly hooked up. Will autopsy soon. Anyone have a spare 70-71? Tac/ gauge set? |
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#9
06-14-2021, 11:46 AM
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I 'm fighting the same issue with dash lights.
thanks to those that posted . big help |
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