Learn from my mistake-computer wiring.
Thread Starter
On The Tree
Joined: Dec 2009
Posts: 174
Likes: 2
From: Aurora IL
Learn from my mistake-computer wiring. My car pulls its charge reading directly off the computer. Since finishing my build it would see mid to low 13v. Sometimes dip into the 12’s with the headlights on and fans kicking on. Checking the battery, it was getting 14.7ish but for some reason the computer wasn’t seeing it.
I upgraded the constant 12v feed to the computer to 10 gauge directly off the battery.
added a sense wire off the alt. (Which did help a little. I started seeing .3 more v)
Upgraded all grounds.
Nothing got it it higher than 13.6 at idle with everything off. And once everything got warmed up 13.3.
SOLUTION: I recently moved my battery to the trunk and added a cut off switch. Instead of my factory 66 Chevelle keyed/run 12v panel feeding a fuse panel I added that ran all my accessories I added like radio/gauges etc. I now have the keyed/run 12v going directly off factory panel, to cut off switch, feeding into the computer. Nothing else on this circuit! Instantly saw 14.5 on the first start up. Problem solved. Thought this might help a fellow swapper out there seeing lower voltage than they think they should.
I upgraded the constant 12v feed to the computer to 10 gauge directly off the battery.
added a sense wire off the alt. (Which did help a little. I started seeing .3 more v)
Upgraded all grounds.
Nothing got it it higher than 13.6 at idle with everything off. And once everything got warmed up 13.3.
SOLUTION: I recently moved my battery to the trunk and added a cut off switch. Instead of my factory 66 Chevelle keyed/run 12v panel feeding a fuse panel I added that ran all my accessories I added like radio/gauges etc. I now have the keyed/run 12v going directly off factory panel, to cut off switch, feeding into the computer. Nothing else on this circuit! Instantly saw 14.5 on the first start up. Problem solved. Thought this might help a fellow swapper out there seeing lower voltage than they think they should.
