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Old 12-04-2017, 05:27 PM   #1
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wiring up turn signals and brake lights

sorry if this has been covered before, but can some of you old timers tell me
the correct order of the pins for the 4 wire round electrical plug in at the
back of the motorhome below the hitch? i believe i have a yellow wire,
white wire, brown wire and a red wire.

when i plug in this connection to my toad and turn my left turn signal on
my right signal comes on at the back of the toad? also i dont seem to have
any brake lights at all no matter what? very frustrating.

thanks for any help.
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Old 12-04-2017, 05:41 PM   #2
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You'll find it here I just googled 4 wire trailer plug

https://www.google.com/search?q=4+wi...wPjqYEpBovGCM:
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Old 12-04-2017, 06:13 PM   #3
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mr. seaview-

The symptoms you describe typically indicate a poor ground on the toad or the coach.
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Old 12-04-2017, 06:42 PM   #4
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Green right, yellow left, brown tail, white ground.

Make sure you have a good ground.

If you have independent brake lights, you will need a converter box.

https://www.etrailer.com/question-6314.html
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Old 12-06-2017, 06:51 PM   #5
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thanks twinboat. wired the plug just like you told me but i am still not getting any
current to the back of the jeep?? turn signals work fine at back and front of my
motorhome but nothing at the back of the jeep? maybe fuse burned out at the jeep???

thanks for your help.
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Old 12-08-2017, 01:29 PM   #6
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Quote:
Originally Posted by mr. seaview View Post
thanks twinboat. wired the plug just like you told me but i am still not getting any
current to the back of the jeep?? turn signals work fine at back and front of my
motorhome but nothing at the back of the jeep? maybe fuse burned out at the jeep???

thanks for your help.
A lot will depend on how your Jeep has been wired. Does it have a diode kit installed? Was it wired with a separate set of bulb sockets in the tail light assemblies? Toad wiring is not exactly the same as trailer wiring.
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Old 12-15-2017, 01:12 PM   #7
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wiring electrical

after testing elect current at the back of the motorhome plug in i am not
getting any current to the back of the motorhome plug in? i tested all 4
pins and nothing? no current? apparently i have a bad fuse or short or
something stopping or preventing current from getting to the back of the
motorhome 4 pin plug? my turn signals at front and rear of motorhome seem
to work fine except left signal velvac mirror flasher is not working when i turn
on left turn signal? right signal and mirror are working fine.

very frustrating as i have been chasing this problem for 3 days. i must have
a bad fuse or short that is preventing the current from flowing to the rear
plug in at back of the rv. i will check my fuses today and see if i have a bad
fuse? if the fuse was bad why are the turn signals front rear of the rv still
working? since the turn signals work at the back of the motorhome makes
me think that i am getting current to the back of rv ???? just no current
to the 4 pin plug? very very frustrating/ any help is appreciaterd.
thanks again. i have exhausted all avenues i can think of.
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Old 12-15-2017, 01:22 PM   #8
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The wires for the plug likely come from the front, not hooked to the wires at the back. They might not be hooked up at all. Try to crawl under and follow the wires all the way from the plug at the back to the front or wherever they disappear.
Sometimes there are fuses in a panel at the front for your trailer light plug.
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Old 12-15-2017, 01:57 PM   #9
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mr seaview-

Ford F-53 chassis usually has separate fuses and relays for the coach and trailer light circuits.

According to the manual for a 1999 F-53 (available online at this link):

Trailer left turn/stop lamp is 10A fuse #6 on under-dash fuse panel (also known as Central Junction Box or Passenger Compartment Fuse Panel)

Trailer right turn/stop lamp is 10A fuse #12 on under-dash fuse panel (also known as Central Junction Box or Passenger Compartment Fuse Panel)

Trailer tow running lamp is 20A fuse #12 in under-hood fuse box (also known as Power Distribution Box)

This information is also available in the 1999 F-53 Ford Body Builder Layout Book, available by this chain of links:

https://www.fleet.ford.com/truckbbas...bodybuild.html
https://www.fleet.ford.com/truckbbas...9/maintoc.html
https://www.fleet.ford.com/truckbbas...erdutyF53.html
https://www.fleet.ford.com/truckbbas...99/167_171.pdf

NOTE: Your 1999 Seaview may be built on a 1997 or 1998 Ford chassis, in which case the fuse panel layouts may be different than listed above.
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Old 12-15-2017, 02:02 PM   #10
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mr seaview-

Does your coach (not your toad) have separate or combined stop and turn lamps?
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Old 12-15-2017, 06:00 PM   #11
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i believe they are separate but not sure?

mark

when u refer to passenger compartment fuse panel are u referring to the fuses that are
on the drivers side under the window nest to left drivers side armrest?
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Old 12-15-2017, 06:12 PM   #12
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If your Sea View is like mine the inside fuse panel is inside the plastic arm rest thing on the inside wall on the drivers side. Where the leveling control is. The cover is held on with velcro.
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Old 12-15-2017, 07:07 PM   #13
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thanks john wayne found it and replaced a blown 10 amp fuse so yeah now have \left turn signals working properly/ thanks again. the only other one i suspect has a blown
fuse is the running lights. will work on it tomorrow. thanks
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Old 12-15-2017, 07:12 PM   #14
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Ford builds the CJB (Central Junction Box, aka the Passenger Compartment Fuse Panel aka Instrument Panel Fuse Panel) onto the end of a wire harness that's about an inch-and-a-half in diameter and a few feet long. It's up to the coach builder to find a place to attach it to the interior of the coach. Usually, it ends up to the left of the steering column, under the dash, attached to the firewall or the wall below the driver-side window. It will look like the picture in the Ford manual.

To test whether the turn and stop lights are separate, have an assistant operate the turn signals and then the brakes. If different lights on the rear light up, you have separate turn and stop lights. If the same lights light up, then your coach has combined turn and stop lights.
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