Troubleshooting Trailstar Trailer Brake and Turn Signals Not Working While Running Lights Work

Question

Question:

My Trailstar Trailer running lights work but both brake and turn signals do not!!!!

asked by: Tom W

0

Expert Reply:

There are a few things you will need to check on your trailer tail lights. First is the simplest and checking the light bulbs to ensure they are not burnt out. The tail light bulbs will have 2 filaments inside the light for the running lights and the brake/turn light. While you have the cover off you will want to verify the correct filament is getting power on the light. If the brighter filament is getting power when the running lights are on it will be hard to see the lower power filament if that is activated off the brake light/turn signals.

If you do not have power going to the light you can use a Test Light # PTW2993 to check for power on the harness to determine if the harness is getting power from your tow vehicle or if the wiring had become damaged on your harness and is shorting out.

expert reply by: Bud M

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Answer 1

On your 2014 Harley Tri Glide, there is an open circuit on that brown pin for your running lights. I recommend tracing that wire with a circuit tester like #PTW2993 to locate the short. It sounds like it was spliced in on the wrong side of your…

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Answer 2

Yes. There should always be a very light power on your brake controller wire. However, it should be extremely minimal. As you increase in power using the manual override, you should see an incandescent circuit tester like #PTW2993 going from almost…

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Answer 3

When checking the wires associated with a brake controller, you should use a incandescent circuit tester like #PTW2993. This will actually cause a power draw on the wire to light the bulb and give you an accurate visual of if the system is…

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Answer 4

When a fuse is constantly blowing it does sound like something very simple - you have overloaded a circuit which is causing the fuse to blow so your best option would be to utilize things like LED lights that draw less power as opposed to any…

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Answer 5

Your main problem is an insufficient ground for the trailer wiring. Try improving the connection of the main ground wire of the trailer wiring harness. Make sure it is attached to a clean metal surface. Or you can run all of the trailer wires back to…

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Answer 6

I contacted the manufacturer about the wattage draw of the Hook Probe Circuit Tester #PTW2993. They told me that the circuit tester will pull at least 5 watts.

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Answer 7

You have a short between the running light and stop/turn circuit on the side of the vehicle that stays on with the headlights. Go over that circuit starting at the assembly looking for any cut or exposed, touching wire and fix as needed.

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Answer 8

That certainly sounds odd. Here is what I would try: First, unplug the brake controller for 5 minutes and plug it back in. This will perform a hard reset on the controller which is sometimes necessary after a new installation. If that doesn't…

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Answer 9

You need to confirm your routed the brake lines to the proper pin on your trailer connector or you need to check the wiring on your vehicle side. The brake magnets can be wired either way, just one wire power and one wire ground. It sounds like there…

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Answer 10

Sound like one of the assemblies has the running light and stop/turn circuit switched as the brigher filament of the bulb should be the same on both lights and would explain why the side doesnt' work properly. On the dimmer assembly try swapping…

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Answer 11

You will need the Red LED Trailer Clearance or Side Marker Light #328-K-52 or Amber LED Trailer Clearance or Side Marker Light #328-K-51 for your 2018 Forest River Sunseeker motorhome. These lenses have the same Top Command SAE-AP2-16 markings on the…

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Answer 12

Since you have a wheelbase/axle spacing of 38 inches the correct hanger kit for slipper springs would be the part #HAP-105-205-01. And then for a 7k trailer axle the u-bolt kit you'd want would be the part #APUBR-8. I attached the diagram to use…

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Troubleshooting Trailstar Trailer Brake and Turn Signals Not Working While Running Lights Work

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