Join Date: Oct 2001
Location: Redondo Beach, CA
are my gauges causing a short?
Im installing fuel injection and need 12V key switch to the ECU. battery disconnected. So i find a wire that ive got tapped to the ign fuse terminal at the fuse block. i wanted to make sure that it was in fact 12V, so i did a resistance measurement to ground..expecting an open circuit (not grounded at all). Well, come to find out, i got around 77 ohms.
At this point, im wondering what is 77 ohms. thinking its my door switch grounding through bulbs, i shut my door. resistance is still there. So i wonder.. are my gauges causing some resistance to ground?
sure enough, i unplug all my gauges in the console and the resistance goes to open...
these gauges are all just voltage dividers right? they should have resistances.
But, i dont have my temp sender hooked up right now. So that circuit should not go to both ground and power because the sender isnt there to complete the circuit... Right??
bad ground somewhere? or perfectly normal?
just for kicks, do you have a resistance measurement across the temp gauge terminals? both plugged in and unplugged to the connector?
1967 SS 396, M20.
now a 10.4:1 540, AFR 315 heads, UDHarold SR Cam with a Tremec TKO