Problem With my 2001 Pontiac Bonneville
3.8 3800
e
tip/donation yes
GM tech = any
question = my a/c quit working ,did not lose charge ,clutch is not engaging,fan blows ok
,controls slow speed and fast work ok ,checked a/c fuse ok,relay ok
JK:
A few things.
Must be sure there is good freon charge.
Are you familiar with the use of a test light or volt meter along with a schematic. I can get you a
schematic with some help of what circuits to test.
The a/c control head sends a request for clutch operation to the powertrain control
module(PCM). The PCM looks at a few things to determine if the clutch should be engaged.
The PCM grounds the a/c clutch relay, and voltage is sent to the a/c clutch on the DARK
GREEN wire, and the BLACK wire on the clutch is the ground side.
VISITOR:
Yes i have a test light and meter. A schematic would be great, thanks.
JK:
OK. I will e-mail that info out to you. Let me know if you need more help.
JK
3.8 3800
e
tip/donation yes
GM tech = any
question = my a/c quit working ,did not lose charge ,clutch is not engaging,fan blows ok
,controls slow speed and fast work ok ,checked a/c fuse ok,relay ok
JK:
A few things.
Must be sure there is good freon charge.
Are you familiar with the use of a test light or volt meter along with a schematic. I can get you a
schematic with some help of what circuits to test.
The a/c control head sends a request for clutch operation to the powertrain control
module(PCM). The PCM looks at a few things to determine if the clutch should be engaged.
The PCM grounds the a/c clutch relay, and voltage is sent to the a/c clutch on the DARK
GREEN wire, and the BLACK wire on the clutch is the ground side.
VISITOR:
Yes i have a test light and meter. A schematic would be great, thanks.
JK:
OK. I will e-mail that info out to you. Let me know if you need more help.
JK
Answer: Check all vacuum lines and connections coming from cruise control module to intake
manifold. Possible bad diaphram in cruise unit, can check with vacuum pump, hotter weather
would make vacuum leaks more noticeable. Heat could also make an electrical issue more
prevalent although speed should not. The only exception would be a vehicle speed sensor that
is not reading correctly. Wiring should be checked from the speed sensor on the transmission
to the cruise control switch and to the cruise control module under the hood. The best time to
check for problems is when the cruise control is acting up on a hot day
manifold. Possible bad diaphram in cruise unit, can check with vacuum pump, hotter weather
would make vacuum leaks more noticeable. Heat could also make an electrical issue more
prevalent although speed should not. The only exception would be a vehicle speed sensor that
is not reading correctly. Wiring should be checked from the speed sensor on the transmission
to the cruise control switch and to the cruise control module under the hood. The best time to
check for problems is when the cruise control is acting up on a hot day
1996 Bonneville.
Engine size 6 cylinder.
Question = Speed control will not work in 90 or above degrees hot weather except when going 70 or above MPH.
I have been speeding up to 70 MPH and then pushing the slow button to desired speed. Any suggestions? Bill
Engine size 6 cylinder.
Question = Speed control will not work in 90 or above degrees hot weather except when going 70 or above MPH.
I have been speeding up to 70 MPH and then pushing the slow button to desired speed. Any suggestions? Bill
