In January of this year I replaced the ECM with a rebuilt because the alternator quit charging and I had it tested and it tested good at the time. Pickup ran and worked fine since that time but quit charging again recently. Checked alt. Again and it puts out fifteen plus volts so ordered a replacement ECM that was under warranty. Installed ECM. Charges part of the time and quits after a few miles on our country roads. I have followed your threads on testing at the computer at pin 60 etc. Yesterday I added a jumper wire from the 60 pin position back to the green wire on the alternator when it would not kick in and it immediately started charging 14.8 volts. I thought this indicated a bad wire was causing the problem. I installed the jumper wire. It charged fine for a few minutes and quit again. This morning I removed the jumper wire and stared pickup. It charged for a few seconds and quit again. At this time I tried to jump it again from pin 60 back to the alt. Again and it would pickup.
I am trying to keep from installing older style regulator because of the check engine light issue.
I just cannot make sense of the intermittent coming and going of the charge. It would seem to me that the regulator in the computer would either work or not at all.
Any suggestions would be greatly appreciated.
have the same problem?
Tuesday, June 13th, 2017 AT 6:11 AM