Persistent electrical problems
JA: What is the make/model/year of your car?
Customer: 2002 Ford Focus SE, Engine
2.0L SOHC (Not Ztec) VIN:1fafp34p32w171314
JA: How many miles are on the car? Is it an automatic or a manual transmission
Customer: 95k ish automatic
JA: Are you fixing your Focus yourself? What have you tried so far?
Customer: Yes, give me a minute to detail it fully
JA: Anything else you want the mechanic to know before I connect you?
Customer: Would not start, Junped it and took to Oriley Auto parts, where battery checked good, and alternater bad.
Replaced with Ultima Alternator
P/N 8231B, afterwards battery voltage ranged from about 12.4V (not charging) to 17.2V (way overcharging). The Orileys (on the car) tester said the voltage regulator
(in new alternator) was bad. Ordered another new identical alternator, but this time had Orileys bench test it before installing it, it tested good. The second replacement alternator did exactly the same things, 12.4V - 17.2V and (on the car) testor showed bad regulator. The original replacement alternator was also bench tested and found to be good (on the bench tester only).So I have two replacement alternators that test good on a bench tester in the auto parts store, but test bad in the car with very erratic voltage. All connections are clean and tight.Since then I have replaced: the battery, PCM and alternator pigtail. Additionally the instrument cluster is acting up, it goes from 0-140 mph and all other gauges make a similar swing, and the battery light goes on and off at random.