1994.5 - 1997 7.3L Power Stroke Diesel

maxi fuse #18

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Old

Oct 18, 2009 | 08:09 PM

#1

jimwilsonmasonry

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From: indy

maxi fuse #18

what does the fuse #18 under the hood do i was checkin all my fuses under my hood and it was blown

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Old

Oct 18, 2009 | 08:30 PM

#2

pjwoolw

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From: San Ramon Ca.

Club FTE Silver Member

Could be Trailer Battery Charge Relay. If I'm looking at the correct diagram.

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Old

Oct 18, 2009 | 08:35 PM

#3

jimwilsonmasonry

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From: indy

whats a trailer charge battery relay do

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Old

Oct 18, 2009 | 10:08 PM

#4

joe_13894

Fleet Mechanic

Joined: Aug 2007

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From: The boonies by Dallas OR

Quote:

Originally Posted by jimwilsonmasonry

whats a trailer charge battery relay do

Exactly what it says it does.

There is a relay in the small box next to the power distribution box. The coil of the relay is powered through fuse #5 (backup lamps) when the key is on.

Fuse #18 connects to the contacts on the trailer charge relay. When the key is on, 12V power is sent to the trailer connector to charge the battery in the trailer.

If you're not charging a trailer or camper battery, you don't care if fuse #18 is removed.

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Old

Oct 19, 2009 | 10:13 AM

#5

jimwilsonmasonry

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From: indy

oh ok thanks guys

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Old

Oct 19, 2009 | 07:59 PM

#6

RÖENTGEEP

FOREIGN GURU

Joined: Jul 2006

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From: Celaya, Gto. MX

Club FTE Silver Member

Quote:

Originally Posted by joe_13894

Exactly what it says it does.

There is a relay in the small box next to the power distribution box. The coil of the relay is powered through fuse #5 (backup lamps) when the key is on.

Fuse #18 connects to the contacts on the trailer charge relay. When the key is on, 12V power is sent to the trailer connector to charge the battery in the trailer.

If you're not charging a trailer or camper battery, you don't care if fuse #18 is removed.

here is a pic of the relays and the power distribution box:

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Tags

18, 1997, 2000, 73, 96, battery, box, charge, charging, distribution, f150, f250, f350, ford, fuse, maxi, relay, trailer, truck

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