Alternator Problem

[mrbizness1]

About 1 year ago I had the alternator replaced. The alt light had come on but my daughter ignored it. THE SHOP USES BOSCH REMANS. A few months ago the alt and brake lights were always flickering, the shop said the battery was bad ( it was only 2 years old and I had checked it before bringing it to the shop)so I refused to replace it, I swapped batteries with my car and the lights stayed on. She drove it for 4 months with the light flickering until the other day when it died. I replaced the battery to get it home. (it was cheaper than a tow). I checked the alt output and it was only 10.5 amps. The shop replaced the alt. A few hours later the car broke down, I replaced the battery, checked the output it was 11.75, drove it to the shop the next morning and they couldn't find the any problem and tested it in front of me. Today the alt. light came on then went out when she came to a stop. I checked the output which was 14.5. Coming home the car just made it into the driveway and before it died the output was 9.5 and the alt light was off. Now it dosen't light at all even when the key is turned on. IT seems that this problem starts within 10 minutes from starting the motor when gradually the charge rate drops. If no problem arises after ten minutes it will run for hours flawlessly. The shop wants to change the computer, but can't say for sure if it's the problem.Any Ideas would be appreciated96 Maxima 135k

Modified by mrbizness1 at 7:58 PM 10/3/2005
Modified by mrbizness1 at 8:01 PM 10/3/2005

[Silvia007]

From the way it wounds, it may be bad wiring. Not that anyone messed with it... the wires could have just gotten old and and such. Anyway, my first 240 was doing the same thing just about. I got pissed off at it and went to a local auto store and bought plenty of 4 and 2 gauge wiring and other stuff to make my own ground and live wiring harness. I took the 4 gauge crimped and soldered (with a torch) some nice heavy loop ends to them and attached about 4 directly to my negative terminal on my battery. I then proceed to wire one to my chasis, one to the intake manifold, one to the other side of the engine, and one to the firewall. For the 2 gauge wire, it went from the positive terminal on the alternator directly to the positive terminal on the battery. From then on, I never had any electrical problems again.