USE CODE: B094VQ88X2 - This Amazon Pick is Recommended by Saabnet.com!
Site News - 7/11: No New News Today | 5/10: Members: Log In to See Fewer Ads!
[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Clubs | Other Cars | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

C900 Bulletin Board
1979-1993 & 94 Conv [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main C900 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Faulty ignition amplifier, or so I thought.
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Jim Stevens [Email] (more from Jim Stevens) on Tue, 17 Feb 2009 06:09:46 Share Post by Email
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

1990 Saab 900S. A cautionary tale of how I almost unnecessarily bought an ignition amplifier.

As has been the case lately, I spent the weekend working on the Saab. The focus was on the cooling system, so I replaced all the hoses, pulled the radiator to have a look, and just generally tidied things up. I also replaced the battery cables, the cable connecting the alternator to the starter, and cleaned up any electric connection I could get to. Replaced the alternator bushings and a few other things as long as everything was dismantled and easier to access.

Finished the job mid-day Sunday and it would not start. I retraced my steps to make sure I didn't forget to reconnect anything. Found nothing. Pulled one of the plugs and determined I had no spark.

I started to run the diagnostics listed in the Bentley. I had power to the coil, the ignition control unit, and the ignition amplifier. I checked the coil and knock sensor. When I ran the diagnostic for the ignition amplifier switching function (Bentley page 340-10 for those of you following along in our hymnal), it tested bad. Bentley says if this is the case, replace the ignition amplifier. I figured before I ordered the part, that I'd make sure the wiring between the coil and ignition amp was sound.

What I found was that I hadn't reconnected the coolant temperature sender (top left of the radiator)properly. Stupid, and basic, mistake. Anyway, when I reconnected it, the car started just fine.

I looked at the wiring schematic this morning and don't know that the temperature sender is listed anywhere. Obviously it feeds into the system somewhere, maybe the control unit, which feeds info to the amplifier?

I guess the bottom line is that I should have been a little more careful when plugging everything back together.





posted by 69.180.16...
Posts in this Thread:
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup
Post a Followup

No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.

Name: Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.

Subject:

Posting rules are simple - No for sale/wanted ads may be posted here - use the site classifieds.
You may not cross-post your message to multiple BBs.
Not permitted: political/religious topics and being disrespectful (personal attacks, insults, etc...).
 Site Members do not see any red text, inline ad links, bottom of page anchor ads, box ads, or anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the Saabnet.com Classifieds)
Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).

Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post above, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).
Optional Link: (e.g. http://www.saabnet.com/)
Link Title: (Optional)
Optional Photo/Image Link: (e.g. http://www.saabnet.com/img.jpg)
Photo/Image to Upload: (Please be patient while file uploads)



StateOfNine.com
SaabClub.com
Jak Stoll Performance
M Car Covers
Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2025 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)
This is a moderated bulletin board - Posting is a privilege, not a right. Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY. Classifieds are to be listed in The Saab Network Classifieds pages. This is a problem solving forum for over 250,000 Saab owners, so expect to see problems discussed here even though our cars are generally very reliable. This is not an anything goes type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the Saabnet.com Mission and Purpose Page. Please remember that you are not anonymous. Site Contact | Site Donations | Other Sites by SP - Poverty2Prosperity.org | Run Club Menlo Park | ScreenBot


Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all the Site Membership Benefits!