Trailer Light Plug Help??
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Senior User
Joined: Dec 2004
Posts: 122
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From: La Grange, TX
Trailer Light Plug Help??
The big round one...that I've never used... on my 01 PS 7.3
It doesn't work, the small flat 4 does, as do 2 flat 4 ones that I"ve wired in.
I now have a trailer that needs that big connection, where do I start looking? I've done all the fuses. Seems that its gotta be something fairly simple that I'm overlooking somewhere.
Thanks, Jeff
It doesn't work, the small flat 4 does, as do 2 flat 4 ones that I"ve wired in.
I now have a trailer that needs that big connection, where do I start looking? I've done all the fuses. Seems that its gotta be something fairly simple that I'm overlooking somewhere.
Thanks, Jeff
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Joined: Mar 2007
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From: Texas
Originally Posted by PaysonPSD
You didn't overlook the under hood fuses did you?
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Senior User
Joined: Dec 2004
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From: La Grange, TX
Checked ALL fuses, but did not know about the relays.... only checked what was installed, did not read further.
Have no brake controller yet, but do seem to have a pigtail and there may be relays in that bag, will definitely look. I was thinking it almost had to be something like that.
No juice with a voltmeter or test light...
Thanks, Jeff
Have no brake controller yet, but do seem to have a pigtail and there may be relays in that bag, will definitely look. I was thinking it almost had to be something like that.
No juice with a voltmeter or test light...
Thanks, Jeff
Post Fiend
Joined: Feb 2007
Posts: 7,191
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From: Blairsville,Ga
think lights are supose to work without the extra fuses and relays
where I found my problem,the seven prong plug plugs into the harness at the bracket right at the plug and that plug was corroded
it done this in a matter of weeks
where I found my problem,the seven prong plug plugs into the harness at the bracket right at the plug and that plug was corroded
it done this in a matter of weeks
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Joined: Feb 2007
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From: Sterling Heights,Mi
Originally Posted by zx250
Check fuses 3,4 and 8 under the hood. In mine the relays were there, just not fuse #8. The relay are under one of the two little black covers beside the main fuse block.
Of the next Riffraff East
Joined: Oct 2004
Posts: 8,679
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From: Concord NC
Nope, just helping a friend straiten his mess out. I still have the fuse diagram and his was a 01. Your right about #1, I missed it. Here's the layout for trailer fuses and relays under the hood.
#1 Trailer Tow Left Stop/Turn Lamp
#3 Trailer Tow Right Stop/Turn Lamp
#4 Trailer Tow Back Up Lamps/Trailer Tow Park Lamps
#8 Trailer Tow Electronic Brake Illumination, Park Lamp, Trailer Tow Park Lamp Relay Coil.
All of the above are mini fuses.
#38 and #39 are relays, 38 is a trailer tow backup lamp relay, and 39 is a trailer tow battery charge relay.
Yours may be like my buddies and some one disconnected the 7 round plug from the harness to wire a 4 flat in line with rear lights. It works for 4 wire, but to use all 7 wires, in could brakes, battery charge, and backup lights, you need the fuses and relays under the hood.
#1 Trailer Tow Left Stop/Turn Lamp
#3 Trailer Tow Right Stop/Turn Lamp
#4 Trailer Tow Back Up Lamps/Trailer Tow Park Lamps
#8 Trailer Tow Electronic Brake Illumination, Park Lamp, Trailer Tow Park Lamp Relay Coil.
All of the above are mini fuses.
#38 and #39 are relays, 38 is a trailer tow backup lamp relay, and 39 is a trailer tow battery charge relay.
Yours may be like my buddies and some one disconnected the 7 round plug from the harness to wire a 4 flat in line with rear lights. It works for 4 wire, but to use all 7 wires, in could brakes, battery charge, and backup lights, you need the fuses and relays under the hood.