1990 Buick Riviera battery drain - Automotive Wiring and Electrical


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1990 Buick Riviera battery drain

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Staplite4
New User

Aug 3, 2013, 1:54 PM

Post #1 of 5 (2693 views)

1990 Buick Riviera battery drain	Sign In

1990 Buick Riviera 190K miles.
Battery has a current drain when everything should be off. Current is measured with ammeter in series with battery connection.
Drain is 360 ma. Removing fuse F4 (lighter) removes the drain.
When F4 is installed, there is about 30 second delay, and the drain returns.
Aftermarket manual only shows ash tray lamps wired to that fuse. (Clearly the wiring diagram is incomplete).
Disconnected the lighter harness in the center console, but it not remove the current drain.

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 3, 2013, 2:45 PM

Post #2 of 5 (2676 views)

Re: 1990 Buick Riviera battery drain	Sign In

Are you allowing time for all the timers to expire before reading this? This can take as long as an hour to happen on some vehicles.

Do you have all the door switch and hood lights rigged to stay off?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Aug 3, 2013, 3:00 PM

Post #3 of 5 (2672 views)

Re: 1990 Buick Riviera battery drain	Sign In

The cigar lighter fuse also protects the circuits for the rear cigar lighter, the exhaust solenoid on the electronic level control compressor, and the electronic level control height sensor.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

Staplite4
New User

Aug 3, 2013, 3:49 PM

Post #4 of 5 (2666 views)

Re: 1990 Buick Riviera battery drain	Sign In

Door and hood switches are off. We are measuring this because the battery gets completely discharged in about 7 days.

Staplite4
New User

Aug 3, 2013, 3:53 PM

Post #5 of 5 (2661 views)

Re: 1990 Buick Riviera battery drain	Sign In

Both cigar lighters are disconnected at the center console. That was our first suspect.
I will check into the level control items.
A good schematic might help!

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