fuse #20 battery draw - HELP! - Ford Powerstroke Diesel Forum
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Old 02-26-2014, 11:36 AM
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fuse #20 battery draw - HELP!

Every time I park my truck I have to pull underhood fuse #20. When the fuse is in, it draws amps starting around 0.1 and eventually going up to 0.3. This is with the ignition/engine off.

What does this fuse control? So far, all I can notice is the cab light and the transmission speed sensor.

I tried disconnecting everything I could think of including the radio, headlights, cig lighter, glovebox light, etc.

I replaced the glowplug relay just in case. Alt and both batteries are brand new (the draw killed them).

I am really at my wit's end. I need to know where else I can try checking to see if the amps drop if I disconnect other items to determine the culprit. Please help.

Thanks!
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Old 02-27-2014, 12:18 PM
Johnny Law Brown

 

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According to a couple diagrams I looked at fuse #20 controls all kinds of stuff I would keep pulling fuses to narrow it down further and then get back. You should be able to isolate it down to an individual circuit to help troubleshooting.
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Old 02-27-2014, 12:36 PM
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Could you point me in the direction of what else fuse 20 controls?

I literally pulled every fuse in the whole truck.

Fuse #20 was the only one with a vampiric battery draw.
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Old 02-27-2014, 12:41 PM
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any help?

1999 F250 7.3 super fuse #20 blows when trying to start - Ford Truck Enthusiasts Forums
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Old 02-27-2014, 04:27 PM
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Now we are getting somewhere:

I want to test the DTR solenoid as it appears to be a likely culprit. The question is, where is the solenoid located? Anyone have a part number so I can order a new one if need be?
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Old 02-27-2014, 04:59 PM
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side of the tranny... Board sponsor Sunrise should be able to look it up for ya


Last edited by Heavy_GD; 02-27-2014 at 05:54 PM.
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Old 02-27-2014, 05:15 PM
Johnny Law Brown

 

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According to all data. Fuse #20 protects circuit breaker #12 and fuse #16. Those circuits include: cigar lighter, Data Link Connector, Power Door Lock, Power Lumbar, Anti-theft & Keyless entry
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Old 02-27-2014, 08:18 PM
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Um, pretty sure there is no such thing on the OBS; the link above references an SD truck.

The owner's manual will tell you what you need more quickly than any online research. UH fuse 20 energizes interior fuses 4, 8, 12, 16. Too many things on each of those fuses to list here, but you could try pulling all of those, re-installing the maxifuse, then re-installing each of the interior fuses until you get the draw again.
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