Originally Posted by Mopar_Aaron

Still no charge guys. I was reading some stickies and found out that I can switch the ac relay, or starter relay to test the asd? But how do I properly check the cps? I don't want to have to buy a new cps or pcm.. also read that if the ac is working that the pcm is fine? Need some help really want to get this charging issue under control. Put in a new alternator and battery and changed out the battery terminals as they needed replacing. Also put in a new belt and tensioner. What should I test next? Grid heaters are not coming on. I have an aftermarket cylinder key lock didn't get to put the stock one in yet. But this charging issue is driving me crazy.

Originally Posted by jimlj

i don't know if your '92 is the same as my '89 wiring, but here is the wiring diagram I used when installing the engine in my Ford.

Originally Posted by j_martin

You can lose one branch of the PCM and not another. You really have to get serious about trouble shooting, or employ someone who can or you will waste more money on unneeded parts.

Check the large terminal on the alternator. It should be at battery voltage at all times or the 150 amp fusible link is blown.

Check the field terminals. One is held positive by the ASD circuit, and the other is driven to ground by the PCM. If both are at ground, the ASC circuit is faulty. If both are at battery, the PCM branch has a hole in it somewhere. The diagrams are in the stickies.