I have a ford box truck that I hooked up a battery isolator in to run another battery in the box for some heaters. After instalation all electrical tests were fine. Drove the truck for 30 minutes or so and now the alternator is charging at 17 volts and goes up the faster the rpm's. What can cause this problem and how do I fix it?
2006-10-02 09:40:30 · 3 answers · asked by Cameron T 1 in Cars & Transportation ➔ Maintenance & Repairs
You don't say what year, but most newer vehicles use electronic control for the charging circuit. If you didn't connect the "s" terminal for the isolator, the alternator has no way of knowing what rate to charge.
Go back and re-check the wiring and the recommended modifications to the vehicle.
2006-10-02 09:45:21 · answer #1 · answered by Ironhand 6 · 0⤊ 0⤋
ya the voltage regulator might be bad. had the same thing happen to me. replaced the regulator and its been fine so far
2006-10-02 13:43:56 · answer #2 · answered by nickypoo 2 · 0⤊ 0⤋
the voltage regulator is bad or going bad
2006-10-02 09:45:31 · answer #3 · answered by Mike C 4 · 0⤊ 0⤋