1994.5 - 1997 7.3L Power Stroke Diesel  

maxi fuse #18

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Old 10-18-2009, 08:09 PM
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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 10-18-2009, 08:30 PM
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Could be Trailer Battery Charge Relay. If I'm looking at the correct diagram.
 
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Old 10-18-2009, 08:35 PM
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whats a trailer charge battery relay do
 
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Old 10-18-2009, 10:08 PM
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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 10-19-2009, 10:13 AM
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oh ok thanks guys
 
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Old 10-19-2009, 07:59 PM
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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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