Allpar Forums banner

1 - 5 of 5 Posts

·
I'm so far behind I thought I was in first place.
Joined
·
4,810 Posts
Discussion Starter #1
Simple description: the fuel gauge has just started randomly dropping down to E and then returning to normal position. Nothing else seems to be affected. Thoughts? Thanks!
 

·
I'm so far behind I thought I was in first place.
Joined
·
4,810 Posts
Discussion Starter #3
Was thinking a sending unit. Seems to do it when warmed up, not right at first. But once it starts its a regular occurrence.
 

·
Registered
Joined
·
21 Posts
I have a very-recently-acquired 94 Concorde that is doing the exact same thing, except that it does it right away, long before full warm up. Coincidentally, the HVAC blower will will not work while the controls appear to be working properly. BCM perhaps?
 

·
Super Moderator
Joined
·
21,369 Posts
The 1st gen ('93-'97) LH fuel pump and sender assy was easy to access by removing a plate on the trunk floor. You don't have to drop the tank. A test would be to briefly ground the sender wire and the dash gauge should move towards full. This tests the circuit from the sender to dash.
The DRB II/III scan tool is best for ATC/BCM diagnosis. Generally the BCM is OK and the problem is in the ATC head itself. Display lighting can be caused by broken solder joints or failed internal VFD power supply.
 
1 - 5 of 5 Posts
Top