Jeep Wrangler - Restoration & Custom Outfitting
All photos, diagrams, and text on this page © Copyright 2013 - David Todeschini - all rights reserved - see Copyright Terms
Before hooking up a U-Haul trailer
or a pop-up camper, it would be prudent to test the auxiliary tail-light connection to make sure it works. That is the purpose of the Terminator Test box pictured below. The following circuits and modifications can only be done if you have a Trailering package installed on your Jeep
or SUV – which means that you have a hitch and ball, and a 4-conductor cable with a plug at the end for connecting brake / turn signal lights to the trailer you're towing. If you don't have a trailer connector, you can purchase one: Hopkins 48215 60" 4Wire Flat Connector (48035 + 48115). The link gets you what you need to install the connections you need for a trailer, and component labeled 'J1' in the diagrams below.
Another little box I built is permanently mounted to the Roll Bar
behind the driver's seat. The circuit for this box is essentially the same as for the Terminator Test box (above), but without the load resistors (R1, R2, and R3). The unit below displays the Brake and turn signal lights without having to exit the vehicle.
If you want an audible indication of turn signals (so you can hear if
your turn signals are engaged on noisy roads) see a schematic that adds
a Turn Signal Beeper to this monitor
box. Passengers can see these LEDs, and an external connection is provided to wire external LEDs that can be placed in view of a dashboard camera.
If you add the Turn Signal Beeper
circuit to the circuit below, your dash
cameras will audibly record the fact that you activated a turn
signal. In the photos below, you will also see a cigarette lighter plug mounted to the Roll Bar. This plug is used to power the rear-mounted
You can also add a
Turn Signal Beeper circuit to this
box that enables you to hear your turn signals over road noise when you
have the Top down.
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