Brian Moore help electrical anyone temp gauge
Moderator: martauto
Having issues with temp gauge. Gauge bounces up and down when putting load on the car as in hazards heated screen heaters all causing gauge to rise and fall. Making me unsure on temp of engine. M20 325. Any help appreciated
Tried wacking have had clocks out and don’t believe it’s a loose connection. Interested to no where earth points are for dash wiring. Or can dodgy alternators cause strange things like this?
Last edited by Nickerz on Tue Apr 24, 2018 11:44 am, edited 1 time in total.
-
paultv
- E30 Zone Squatter
- Posts: 1541
- Joined: Mon Apr 21, 2014 11:00 pm
- Location: Auf dem Schnee: Germany
I reckon I'd have a loose connection if I kept "wacking my cocks"
4th May 1990 325i Convertible.
BMW E30 Cabriolet Best Mod Ever:
https://bmwe30cabriolet-wdm.blogspot.com/
BMW E30 Cabriolet Best Mod Ever:
https://bmwe30cabriolet-wdm.blogspot.com/
The Earth for this is along the drivers door edge , there are 4 Earth points on these dashboards, under the dash on the drivers side, along the frame on the passenger side and behind the glove box there are 2.
With these cars now well over 30 years old I would suggest checking the resistance of the cable from the dash (Brown/Violet - If I recall) all the way to the temp sender. A dodgy connection on the brown plug could also be the cause as the wire tends to break on the bend before it goes into the connector.
With these cars now well over 30 years old I would suggest checking the resistance of the cable from the dash (Brown/Violet - If I recall) all the way to the temp sender. A dodgy connection on the brown plug could also be the cause as the wire tends to break on the bend before it goes into the connector.
-
Brianmoooore
- E30 Zone Team Member
- Posts: 49358
- Joined: Mon Jan 10, 2005 11:00 pm
There is only one earthing point behind an E30 dashboard, although on cars with extras that increase the number of leads connected, some of the wires may be connected to a short bar with a second stud, fixed onto the first stud.
There is also an earth for column stalk leads to the top f the steering column, whih eventually earths to the body through the steering column lower bearing.
Any other earthing points you may come across weren't put there by BMW.
The main failure point for the temp. gauge wiring on post facelift M20 cars only, is under the lower rubber cover of the injector harness to engine loom plug and socket under the inlet manifold.
There is also an earth for column stalk leads to the top f the steering column, whih eventually earths to the body through the steering column lower bearing.
Any other earthing points you may come across weren't put there by BMW.
The main failure point for the temp. gauge wiring on post facelift M20 cars only, is under the lower rubber cover of the injector harness to engine loom plug and socket under the inlet manifold.