I finished a relay mod for my CAV ignition switch to alleviate a load problem that overheats the switch when the A/C and headlights, then the fans, go on during hot summer nights. It basically takes some load off the switch. However, when I did the mod, everything was good except the radiator fans wouldn't go at the designated temperature ( I have a programmable SPAL controller hooked up to 2 X 12" SPAL fans). Even with the override switch, I can only hear the fan relay clicking. I thought it was low voltage, I charged the battery, but still just clicking of the relay. Is that a symptom of bad ground? Or maybe a bad relay?
Thanks IA