Diamond Star Werks
Freelancer
- 3,244
- 241
- Jun 25, 2011
-
Inman,
South Carolina
Okay so History is when I put this car (98 Spyder GS) on the road a month or so ago the alt was acting up. At times it wouldn't charge at all and at times it would. The regulator was bad in it and it would overcharge up to 19v. It ended up blowing out my high beams on the way to get my other alt to swap it out.
Now with the old alternator still on when I was first trying to figure out what was going on with it, the battery light would come on when it wouldn't charge. That night looking it (before it blew the high beams going to get the other alt) was the last time I seen the battery light working.
Now with this other 110 amp alt that I bought that I had used on my GST without issue it works in a strange way. It will work (charging 14+) when I first start it up then eventually it will switch to only charging around 12.3-12.5vs. I can turn headlights on high, heater fan on high, radio on and step on the brakes and it will still keep charge at around 12.16-12.2X volts.
Now the strange part is whenever it switches to charging 12.2-12.5v is that it will start charging 14.5-14.6 anytime the revs go over 2500 rpm. Also it will start charging 14.6v whenever the engine sees a certain load. I can be driving down the road, torque converter lockup and drop revs down to 1700 rpm, then apply brake and gas to create engine load and it will start charging 14.3 or higher with highbeams on, heater on high, and brake lights on obviously. With all that on at 1700-1800 rpm with engine under a load it will charge 14.5+ volts. Let off the gas to relieve some of the engine load and it switches right back to charging 12.3-12.6 volts.
At no point does the charge light come on. Even with the key on bulb check. All under the hood fuses are good as well as the fuses in the interior fuse block. I cleaned all the contacts for the fusible links in the underhood fuse block. The contacts on the fuses themselves and the eyelets on the wires, as well as the fuse block contact area. Also cleaned the battery ground post, ground contacts that comes of the Neg post to the firewall (removed the paint to bare metal contact, and ground contact area under the a/c hose on the left fender to no change.
Only thing left I have to check is the diode for the charging light which I haven't found its location yet. Is this inside the gauge cluster or else where?
Any help is much appreciated, thanks. Jacob M.
Now with the old alternator still on when I was first trying to figure out what was going on with it, the battery light would come on when it wouldn't charge. That night looking it (before it blew the high beams going to get the other alt) was the last time I seen the battery light working.
Now with this other 110 amp alt that I bought that I had used on my GST without issue it works in a strange way. It will work (charging 14+) when I first start it up then eventually it will switch to only charging around 12.3-12.5vs. I can turn headlights on high, heater fan on high, radio on and step on the brakes and it will still keep charge at around 12.16-12.2X volts.
Now the strange part is whenever it switches to charging 12.2-12.5v is that it will start charging 14.5-14.6 anytime the revs go over 2500 rpm. Also it will start charging 14.6v whenever the engine sees a certain load. I can be driving down the road, torque converter lockup and drop revs down to 1700 rpm, then apply brake and gas to create engine load and it will start charging 14.3 or higher with highbeams on, heater on high, and brake lights on obviously. With all that on at 1700-1800 rpm with engine under a load it will charge 14.5+ volts. Let off the gas to relieve some of the engine load and it switches right back to charging 12.3-12.6 volts.
At no point does the charge light come on. Even with the key on bulb check. All under the hood fuses are good as well as the fuses in the interior fuse block. I cleaned all the contacts for the fusible links in the underhood fuse block. The contacts on the fuses themselves and the eyelets on the wires, as well as the fuse block contact area. Also cleaned the battery ground post, ground contacts that comes of the Neg post to the firewall (removed the paint to bare metal contact, and ground contact area under the a/c hose on the left fender to no change.
Only thing left I have to check is the diode for the charging light which I haven't found its location yet. Is this inside the gauge cluster or else where?
Any help is much appreciated, thanks. Jacob M.
