The above is an advertisment. If it asks you to download software or create an account, please ignore it.
Site News - 11/25: Special Ad Rate | 11/1: 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
Follow-Up - Fuel/Temperature Gauge Progress - 1984 900
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by ForzaSaab [Email] (#1646) [Profile/Gallery] (more from ForzaSaab) on Sat, 11 Apr 2026 15:55:02 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

Saab Community : Thank you for all of the recent ideas regarding erratic temperature gauge behavior in the recent March post. Here is the diagnostic summary.
- The engine is cooling properly, with normal 170°F to 185°F temperatures on the radiator and coolant hose surfaces - measured with a Fluke IR heat gun.
- The resistance of the coolant temperature sensor is correct at 55 to 70 Ohms, depending on engine temperature. So, the sensor is good.
- Temperature gauge has been tested, as follows. The gauge instantly pegs at maximum, when the sensor wire is shorted to ground, and the ignition is on. Therefore, the wiring is intact.

In the first 15 minutes of operation, the temperature gauge rises about 1/4 inch above full cold and stays there. It does not gradually rise to the normal horizontal position. Then the gauge consistently pegs at maximum after about 15 to 20 minutes of operation.

So, my hypothesis is that we are dealing with a bad gauge and a short of some type in the gauge.

To fix this, I was able to source a nearly new instrument panel on e-Bay. However, before the big job of installing the new panel, WHAT ELSE COULD BE WRONG OR SHOULD BE CHECKED ? That is, the last thing I want to find is, that the new panel / temperature gauge behaves the same.

Thanks very much,
ForzaSaab 

_______________________________________
Forza
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 © 1988-2026 - 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!