1995 Pontiac Bonneville

Tiny
BOBBYO
  • MEMBER
  • 1995 PONTIAC BONNEVILLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 150,000 MILES
MY BROTHER AND I REPLACED MY TRANNY, WHEN WE GOT FINISHED WE STARTED THE CAR AND IT RUNS ROUGH. IT THROWS A TROUBLE CODE QDM. ALSO THE VOLTMETER GAUGE READS LOW (ABOUT 10V) SO WE REPLACED THE ALTERNATOR AND HAD IT TESTED AND THE OLD ALTERNATOR WAS BAD. WE ALSO HAD THE STARTER TESTED AND ITS FINE. HOWEVER WHEN WE PUT THE NEW ALTERNATOR ON IT STILL RUNS THE SAME. MY BROTHER SAID THE COMPUTER INDICATED THERE WAS LOW VOLTAGE TO THE PCM. ALSO THE COOLING FAN AND AC DO NOT WORK NOW WE HAVEN'T MESSED WITH ANY OF THOSE SYSTEMS.
Monday, December 31st, 2007 AT 9:45 PM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

have a good look around the engine, especially the in let manifold, sometime when a transmission is removed the engine hanging low on the mounts can disconnect a vacuum line or a loom plug, it may be something you have not touched. Get the engine running then worry about the electrical issues.

Mark (mhpautos)
Was this
answer
helpful?
Yes
No
Tuesday, January 1st, 2008 AT 2:45 AM

Please login or register to post a reply.

Related Alternator Test Content

How to Test an Alternator
VIDEO
How to Test an Alternator
Instructional repair video
Alternator Test
GUIDE
Alternator Test
The alternator in your car is designed to generate voltage at prescribed amperage which is designated by a voltage regulator or vehicle computer. This electrical energy...
VIEW MORE