We need help with an alternator, we plan to get a new truck out the MORE race in 2 weeks but are having a problem
We have a CS144 alt in the truck, it has the battery post and the 4 wire clip(PLIS) We are having difficulty getting the alternator to come on and stay on. We have the S lead hooked up tho the back of the alt on the battery terminal, and the L lead hooked up to a resistor which takes power from the buss bar. We have tried hooking up the I lead to the ignition and have tried switching the P and I connections.
If you interrupt the L lead while running it kicks on and then back off, if you interrupt the circuit above about 3k rpm it kicks on and stays on. It behaves the same no matter how the I and L leads are connected.
Alt pully is a stock 6 groove roughly 2 in diamater. Engine idle is over 2k not in gear. It seams there are nearly as many explanations as alternators. This was built for 250 amps and I can no longer get ahold of who built it, any suggestions would be great.