GT350 16 Report post Posted March 18, 2008 Still in restoration im fitting the dash back in here is what i have replaced. 1. printed circuit. 2.voltage regulator. My problem is gauges dont work and the right side turn signal in dash dont light up also the high beam indicator and the rh side dash lights are very dim. could it be im not getting full power to the circuit board ? Quote Share this post Link to post Share on other sites
Mace 10 Report post Posted March 18, 2008 Wiring harness? Quote Share this post Link to post Share on other sites
GT350 16 Report post Posted March 18, 2008 Wiring harness? The harness is original and never been cut up by previous owners.Could it be i have a bad wire in the harness ? possibly the main feed for the gauges ,my dash lights work ok.javed Quote Share this post Link to post Share on other sites
bnickel 10,004 Report post Posted March 19, 2008 i think you likely have a bad ground somewhere. there is a ground wire for the intrument cluster and lights one the driver side of the lower metal dash just above the headlight switch, you'll have to have the cluster out to even see where i'm talking about but it's one the upper/inner lip of the lower metal dash right above the headlight switch, in fact i think the ground wire may even run down to the switch harness, IIRC, but not 100% certain on that, it's been a while since i put mine back in. the next option is that you have one of the wires in the cluster harness in the wrong location or it has a bad connection. i had both problems with mine but i knew what they were before i started putting the car back together Quote Share this post Link to post Share on other sites
GT350 16 Report post Posted March 19, 2008 ok heres what i have checked last nite. 1. checked for voltage at intrument plug disconnected from dash and i have voltage at each turn signal yet when i plug it into dash i get nothing. 2. I did add another ground wire from back of instrument plug to a good ground made no difference. will do more checks tnite when i get home. Quote Share this post Link to post Share on other sites
ER69STANG 10 Report post Posted March 28, 2008 HEY I just had the same problem and it was the card bourd spacer on the back of gauges under printed circuit. one had moved and the post was touching the metal , you have to pull them and make sure , worked 4 me good luck Quote Share this post Link to post Share on other sites
hkopp 10 Report post Posted May 21, 2012 I have this exact issue, did anyone ever find the solution here? My gauges test fine outside the car using a metered 2-5v....I have a tach dash so only the fuel and temp are there...and not working while plugged in. on the bench hooked up they work great. i also used black tape to ensure they were not touching. I have a few wires cut in the dash...none directly going to the plug. i heard about a possible wire grounded that should not be - this might be it, anyone know what wire it could be? Quote Share this post Link to post Share on other sites
