Some Diagnostic Info - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat
GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

Go Back   GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat > Pontiac Bonneville > 1992-1999

1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

LinkBack Thread Tools Search this Thread
Old 07-21-2003, 11:03 PM   #1
Senior Member
True Car Nut
Join Date: Sep 2002
Posts: 3,392
Thanks: 0
Thanked 0 Times in 0 Posts
fuddyduddy121 is on a distinguished road
Default Some Diagnostic Info

I was messing around with the Automatic Climate Control diagnostics earlier, and I figured I would try a few things.

The first thing I tried was comparing the temperature gauge to the digital temperature gauge on the ACC. Here are the results:

Click the image to open in full size.

On my car, the gauge becomes less and less accurate the higher the temperature. When it says 220 degrees, it is actually only at 210 degrees. I have long suspected this. Note that the low speed fans will not turn on until 212 degrees, which appears to be above 220 if you're looking at my gauge.

The high speed fans will come on at 226 degrees (on the ACC).

I also checked the voltages. With the A/C and lights on, the voltage was around 12.2 at idle. When I reved the engine up to 1500, the voltage rose to 12.8-12.9 and levelled off. If I let the car idle again, and turned on the rear defrost as well, the voltage dropped to 11.7. This is with a 5-year old battery and a fairly new AC Delco alternator.
1999 540iA Sport
Former 93 SSEi Owner
Former 89 SE Owner
fuddyduddy121 is offline   Reply With Quote
Old 07-22-2003, 11:30 AM   #2
Senior Member
Posts like a Turbo
Join Date: Mar 2003
Location: Indianapolis, Indiana
Posts: 311
Thanks: 0
Thanked 0 Times in 0 Posts
along is on a distinguished road

Hey Fuddy,

that seems pretty low, only 11.7V. Shouldnt it be around 13.7 volts to keep the battery charged good ? I understand load on the system will knock down that voltage, but it should be higher than that. That means the battery is being drained while idling

along is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
New diagnostic tool kaps Lounge 5 03-18-2004 10:20 PM
Laptop with diagnostic\ please! 95neongirl Lounge 2 02-14-2004 11:48 AM
Mode 6 Diagnostic Codes mremer General GM Chat 9 11-07-2003 09:37 AM
Diagnostic code help amy_lynn 1992-1999 4 10-10-2002 08:51 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 07:39 AM.