10A parasitic drain! ECU B

[Hugh Jazz]

Any idea where to start looking? Ten amp draw with everything off! Started pulling fuses to check and the B one inside seems to it. Small drop on taillight fuse to.

Only thing I've noticed besides the dead battery after sitting a few days is that

 

[Hugh Jazz]

Sorry that cut off... It's he ECU -B fuse inside that when pulled sees the huge draw drop.

My truck had all lights on when running and all would go off a few seconds after leaving stopping a leaving the truck. Now it seems that I have to move the headlight selector to off to get them off?

Any help or suggestions are greatly appreciated.

 

[ISOMud]

I haven't checked the fuses yet, but I'm also have an intermittent draw that kills the batter after 3-4 days. I did notice that the light around the key ring isn't turning off. I haven't had time or space in the garage to investigate much more than that yet....

 

[Hugh Jazz]

Notices the lights behind the fan/vent selector were really bright for a minute when I first got in today then back to dimly lit after about 30 sec of driving. Pretty sure they were all normally quite dim. Also about 4 weeks ago dash illumination light on the left by oil pressure gauge went out.

The 10A draw seems huge though?

 

[ISOMud]

Yes 10A is alot, thats like a fan or headlight on... But it says it goes to ABS ECU or Airbag sensor (this if for 1996)

 

[ISOMud]

also Light retainer relay, SRS warning light, Cruise control ECU, Data link Connector, and shift lock ECU

 

[TrickyT]

..I did notice that the light around the key ring isn't turning off. I haven't had time or space in the garage to investigate much more than that yet....

Known problem. Discussed here Repairing the Room Lamp Control Module aka Ignition Key Cylinder Light Relay and here Ignition dimming relay.

 

[ISOMud]

Thanks , unpluged the module last night and seems fine now

 

[alia176]

Thanks , unpluged the module last night and seems fine now

Wait a min, that little light is responsible for a 10amp draw?

 

[Hugh Jazz]

Crazy but it appears so. Just located that little green module behind the passenger kick panel and checked. Parasitic draw down from over 10 amps to almost nothing.

Thank you all for the guidance.