NG900 & OG93 |
Vintage Models |
Clubs & SOC |
Other Cars |
Books Movies & Music |
Member Photo Galleries |
Member Directory |
*Buddy Registry |
*Mileage Registry |
What's New |
Photo of the Month |
|C900 Bulletin Board|
1979-1993 & 94 Conv
I have just installed a VDO 0-80 psi oil pressure guage (w. a 0-80 VDO sender) in my 1988 900TC and basically, the higher the revs when the engine is warm, the lower the pressure.
When cold, the guage reads about 20 psi regardless of engine speed. Once warmed up, at speed it reads about 20 but when the engine returns to 850 rpm it increases to about 55 psi; revving the engine to 2000 rpm decreases it to 25.
The S terminal leads is connected to the sender (single terminal) which is grounded to the engine (I did not use any kind of insulating sealer or threadlocker), the + terminal gets its power from the cigarette lighter (I tested the lighter connector is positive with a bulb and ground connection) and the third lower central terminal is grounded to the engine.
I presume the light which I connected to the dimmer switch is a separate circuit and polarity its polarity is not an issue.
I can't imagine what I might have done wrong. Can anyone see what I can't?
Posts in this Thread:
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.
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 -
Your address is: 126.96.36.199 - Using CCBot/2.0 (https://commoncrawl.org/faq/) - Logged.