1999 SAAB 9-5 No heat at all

LVANBROCKLIN

MEMBER
1999 SAAB 9-5
6 CYL
FWD
AUTOMATIC
72,000 MILES

I just read your piece on “not getting heat" on a 9-5.

http://www.2carpros.com/forum/1999-saab-9-5--heater-problem-vt85305.html

My daughter owns a 1999 Saab 9-5. We live in Minnesota and the current temp is about 20 degrees and she is not getting any heat, so this is important!

Here are the particulars:

No heat – either side. Happened suddenly, one day she got into the car and had no heat coming out.

She pused the AUTO and OFF buttons and got the “1 . . . . . . . . 08" which you described in your piece.

However, her fan (blower motor) is not coming on at all (a click but, no sound of the fan coming on) which leads me to believe it is a fuse; but then why would she be getting a code as described above?

I am a “better-than-average" shade tree mechanic but, certainly not a professional – and have never worked on a car as sophisticated as a Saab. I have not looked at her car yet but plan on traveling out to her house this weekend to see what I can find out. I know enough to NOT trust just looking at the fuses and will check them with my VOM and probably just replace it to be safe. Assuming this does NOT fix the problem, what should be my next course of action?
Is the blower motor accessible from under the hood? Can I go someplace under the hood and check resistance of the blower motor - and what should it be?

Some other incidental information – She bought the car used from a private party about a year ago and have been having electrical problems with it.

She just replaced her battery; it died. (Normal – just an FYI)
Her low beam headlights work fine but, not the HIGH beams nor the FOG lights.
Neither cigarette outlets work. Replaced fuse and it blew immediately again. (Indicates a short – but, where?)
..and this happened just once – driving down the road and the info display read “service theft alarm".

Any advice, hints or direction would be greatly appreciated!

3 Replies

BMRFIXIT

MECHANIC
19,053 POSTS

BLOWER MOTOR DOES NOT OPERATE
1. Check for continuity between terminals of fuse No. 22 (40-amp), located in main fuse board. Main fuse board is located between instrument panel and driver's door. If fuse is okay, go to next step. If fuse is blown, replace fuse and recheck blower motor operation. If blower motor operates, repair is complete. If blower motor does not operate and fuse blows, repair short in Red wire between fuse No. 22 (40-amp) and blower motor. If blower motor does not operate and fuse is okay, go to step 8.

2. Disconnect blower motor 2-pin connector located on passenger-side of A/C-heater assembly. See Fig. Connect a test light between ground and female side of blower motor 2-pin connector terminal No. 1 (Red wire). See WIRING DIAGRAMS. If test light comes on, go to next step. If test light does come on, repair open in Red wire and go to step 8.

3. Connect test light between female side of blower motor 2-pin connector terminal No. 1 (Red wire) and terminal No. 2 (Black wire). If test light comes on, go to next step. If test light does come on, repair suspect circuit and go to step 8.

4. Reconnect blower motor 2-pin connector. Using a fused (30-amp) jumper wire, backprobe blower motor 2-pin connector terminal No. 2 (Black wire) and connect to blower motor terminal No. 1 (Red/Brown wire). If blower motor operates at full speed, go to next step. If blower motor does not operate, replace blower motor. See BLOWER MOTOR ASSEMBLY under REMOVAL & INSTALLATION. When repair is completed, go to step 8.

5. Turn ignition off. Disconnect blower motor speed control module 4-pin connector. See Fig.
Connect a test light between ground and speed control 4-pin connector terminal No. 3 (Orange/White wire). Turn ignition on. If test light comes on, go to next step. If test light does not come on, repair open in Orange/White wire between connector terminal No. 3 and ACC control module connector, and go to step 8.

6. Turn ignition off. Using a fused jumper wire, backprobe between ACC control module 39-pin connector terminal No. 1 (Black wire) and terminal No. 35 (White/Green wire). See Fig. Connect a test light between blower motor speed control module 4-pin connector terminal No. 2 (Green/White wire) and terminal No. 3 (Orange/White wire). Turn ignition on. If test light comes on, go to next step. If test light does not come on, repair open in Green/White wire and go to step 8.

7. Turn ignition off. Disconnect ACC control module 39-pin connector. Ensure terminals and wiring are clean, tight and properly connected. See Fig. If connector terminals and wiring are okay, go to DTC B2425. If connector terminals and wiring are not okay, perform repairs as necessary and go to next step.

8. Using scan tool, clear all DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If A/C system is not operating properly and/or a DTC has been detected, ACC control module may need to be replaced.

As far as I know retrieving codes require a scan tool OBDII
check the instructions you have and if u come up with any codes let me know

check cig lighter it self may be bad