If the lights are flashing on your Tekonsha Sentinel brake controller it's most likely going to be a short in the wire, a bad ground connection or poor voltage from the vehicle's battery. You'll want to check the voltage with a multimeter # PT89ZR at the brake controller to ensure it's actually getting 12 volts. Next you can check the ground connection to make sure it isn't loose or corroded. You can also trace the wires to check for any kinks, cuts, or damage that could cause a short.... view full answer...
You will want to start from the beginning to make sure the wires are all connected properly on your 1991 Ford F-150. It sounds like you have somehow connected a 12V constant power wire to your connector.
I have attached a drawing that shows how the pins should be wired on a 6-way trailer connector. The drawing shows both the trailer and the vehicle side of a 6-way round plug.
The red wire that is coming from the brake controller should be connected to the cold side of the brake light... view full answer...
It's normal for a brake controller to send some power back to your 6-way in order to check if a trailer is connected but it should never be enough to drain your battery.
A few things to look at. Inspect your 6-way and make sure it's clean and corrosion free. Inspect the brake circuit wire from the 6-way to the controller checking for any pinch points or damage. A short somewhere in the circuit could cause the drain. Also check your ground and make sure it's secured to a smooth, clean... view full answer...
Per the special instructions in the Curt TriFlex # C24VV user guide, for Ford F-series trucks from 1989-1991 with anti-lock brakes, you do not connect the brake controller blue wire to the stoplight switch. Instead, you need to splice the red stoplight wire to the light green wire located on the turn signal harness connector under the dash near the steering column using the wire tap connector supplied. The blue brake wire should be wired from your trailer connector to the brake controller.... view full answer...
The first thing you are going to want to do is unplug the 4-Way from the 7 and 4-Way so you can test it. You will need a circuit tester # PTW2993 if you do not already have one. The pin right next to the ground pin is the running light circuit. Have someone sit in the truck and operate the running lights while you test with the circuit tester.
If the running light circuit does not work, then you will want to check for a tow package running light fuse or relay. Use the owner's manual and/or... view full answer...
It sounds like the additional weight on the front of your truck when decelerating is an issue. It sounds like the rear of your truck has the additional support but the front of your truck would benefit from suspension enhancement. I recommend the Timbren Front Suspension Enhancement System # TFF2504 which is the only fit we have for your 1976 Ford F-250 4x4. This will help absorb road shock and improve the stability of your truck. view full answer...
It is possible that a pulse preventer # 5501 will at least solve part of the problem. It would be required when the brake control unit must be set to higher output levels and driving with hazard flashers is necessary. But the Pulse Preventer is not necessary for vehicles that have a different bulb for the stop and turn signals (amber turn signals).
It could be that you need to make new connections between the brake controller red wire and the brake switch on the truck. Or it might be... view full answer...
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