HELP MY GT IS EATING ALTERNATORS
04-12-2013, 06:00 PM
#1
HELP MY GT IS EATING ALTERNATORS
As in the title my 05 gt is eating through alternators, first I gor the cam code so as usual i replaced the alternator with a PA perfromance Alternator from AM it failed within 20 miles then I got an oreilys alternator ( time did not permit the AM exchange) and again within 20 miles the alternator gave out. both times i got P0622 and i removed the negative cable and the car died.
I find it unlikely to get 2 bad alternators from 2 different sources, also battery and starter tested fine.
please someone else give me an answer besides go buy another alternator im looking for a reason as to why the alternators are going out so quickly.
I find it unlikely to get 2 bad alternators from 2 different sources, also battery and starter tested fine.
please someone else give me an answer besides go buy another alternator im looking for a reason as to why the alternators are going out so quickly.
04-12-2013, 07:18 PM
#2
2nd Gear Member
Join Date: Jan 2011
Location: San Diego, CA
Posts: 263
Check out the possible symptoms. Good luck.
http://engine-codes.com/p0622_ford.html
Possible causes
- Battery charge
- Faulty Generator
- Generator harness is open or shorted
- Generator circuit poor electrical connection
- Engine Control Module (ECM) controlled generator
- Faulty ECM
Description: The Engine Control Module (ECM) uses the generator turn on signal circuit to control the generator. A high side driver within the ECM allows the ECM to turn the generator ON and OFF. When Generator operation is desired, the ECM sends a 5 volt signal to the voltage regulator via the generator turn on signal circuit. This causes the voltage regulator to begin controlling the generator field circuit. Once the Generator is enabled by the ECM, the voltage regulator controls generator output independently of the ECM. Under certain operating conditions, the ECM can turn Off the generator by turning Off the 5 volt signal on the generator turn on signal circuit.
- Battery charge
- Faulty Generator
- Generator harness is open or shorted
- Generator circuit poor electrical connection
- Engine Control Module (ECM) controlled generator
- Faulty ECM
Description: The Engine Control Module (ECM) uses the generator turn on signal circuit to control the generator. A high side driver within the ECM allows the ECM to turn the generator ON and OFF. When Generator operation is desired, the ECM sends a 5 volt signal to the voltage regulator via the generator turn on signal circuit. This causes the voltage regulator to begin controlling the generator field circuit. Once the Generator is enabled by the ECM, the voltage regulator controls generator output independently of the ECM. Under certain operating conditions, the ECM can turn Off the generator by turning Off the 5 volt signal on the generator turn on signal circuit.
Last edited by Joenpb; 04-12-2013 at 07:35 PM.
04-12-2013, 07:24 PM
#4
6th Gear Member
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
Removing the negative battery cable is a really bad way to test an alternator. You should be checking it with a voltmeter.
" Warning: Never disconnect a battery cable while the engine is running to "test" the alternator. Doing so can cause high voltage spikes that can damage the alternator as well as other electronics."
http://www.aa1car.com/library/2002/cm102…
" Warning: Never disconnect a battery cable while the engine is running to "test" the alternator. Doing so can cause high voltage spikes that can damage the alternator as well as other electronics."
http://www.aa1car.com/library/2002/cm102…
Last edited by moosestang; 04-12-2013 at 07:29 PM.
04-12-2013, 08:10 PM
#7
Well once again you guys save the day, I followed the upgrade pa performance wire to the battery where I found it was black and melted. Why would it have melted it is a direct connection from alternator to battery . I'm going to replace it once more and hope it works with the stock cable
04-12-2013, 08:22 PM
#8
6th Gear Member
Join Date: Sep 2006
Location: Gainesville, FL
Posts: 11,278
Well once again you guys save the day, I followed the upgrade pa performance wire to the battery where I found it was black and melted. Why would it have melted it is a direct connection from alternator to battery . I'm going to replace it once more and hope it works with the stock cable
I bet your PA performance alternator was fine too. Get a voltmeter!