StraightSix
New member
What's considered in the normal range for a voltage drop between battery post and dash harness? I'm trying to diagnose a starter/battery issue that leaves the car unable to start sometimes.
Symtoms:
-On a fresh charge or with a booster pack the car starts just fine. After a few days, starter refuses to turn over.
-Battery voltage between posts reads 12.8v with IGN on, my turbotimer's voltage display (which I tested to be more or less accurate to my multimeter hooked up the it's connector) displays 12.4v with just IGN on, its wired with the dash harness. When I attempt to start the car, battery terminal voltage drops to ~11.9v and turbotimer display shows 10.4-10.6v.
I imagine that the starter signal wire is also seeing this 10.4v and is below the critical voltage to energize the starter solenoid. I haven't had a chance to confirm actual voltage at the starter solenoid yet.
Is this kind of voltage difference between battery post and dash harness normal? Should I start opening up the body harness feeding the dash to look for signs of corrosion or damage?
Symtoms:
-On a fresh charge or with a booster pack the car starts just fine. After a few days, starter refuses to turn over.
-Battery voltage between posts reads 12.8v with IGN on, my turbotimer's voltage display (which I tested to be more or less accurate to my multimeter hooked up the it's connector) displays 12.4v with just IGN on, its wired with the dash harness. When I attempt to start the car, battery terminal voltage drops to ~11.9v and turbotimer display shows 10.4-10.6v.
I imagine that the starter signal wire is also seeing this 10.4v and is below the critical voltage to energize the starter solenoid. I haven't had a chance to confirm actual voltage at the starter solenoid yet.
Is this kind of voltage difference between battery post and dash harness normal? Should I start opening up the body harness feeding the dash to look for signs of corrosion or damage?