I have a 2004 Z71 1500. Recently I put in electric fans off of an 05 with a painless wiring controller. I also added a Carquest 145 amp alternator. The voltage readings on my obd2 port read 12.5V with fans on 100% in the cab and the voltage needle is at 12V. Using a multi-meter the battery is at 13.4V and the alternator outpu voltage is 13.6V. With headlights off, all numbers go up about 0.6V so 14.2 at alternator, 14 on battery, and 13.5 in the cab.
Unfortunately, my multimeter can only read 10 amps, so I don't have a measurement on amperage. The fans are grounded to the hood ground strap. I have disassembled, cleaned, and regrounded the battery ground on the radiator support, the 3 grounds under the driver door, and the engine block and hood grounds.
Does this sound like the alternator can't put out enough current? Or are there more grounds to check? The voltage needle sways a bit despite constant load, but the alternator passed both a bench test and installed test at advance auto. Any help and advice is appreciated.
Unfortunately, my multimeter can only read 10 amps, so I don't have a measurement on amperage. The fans are grounded to the hood ground strap. I have disassembled, cleaned, and regrounded the battery ground on the radiator support, the 3 grounds under the driver door, and the engine block and hood grounds.
Does this sound like the alternator can't put out enough current? Or are there more grounds to check? The voltage needle sways a bit despite constant load, but the alternator passed both a bench test and installed test at advance auto. Any help and advice is appreciated.