Locating Brake Controller Power Fuse On a 2002 Chevy Silverado

Question

Question:

I have a brake control unit that doesn't have power. I can't locate the fuse that needs replacing. Can you tell me what fuse I should be looking for?

asked by: Mark R

0

Expert Reply:

If your 2002 Chevrolet Silverado did not come wired with a 7-Way plug from the factory, you will need to connect the brake controller power wire and the electric brake wire underneath your hood to complete the brake controller installation.

Once you are under the hood, you would remove the bracket in the corner closest to the driver. Then, you would pull the top and lower covers off your fuse block.

You should see a red wire with a ring terminal, and a blue wire with a plug. Take the red wire and place the ring terminal over the closest positive post. You would put a 30amp fuse in the slot closest to this positive post.

To connect the blue wire, you would clip off the plug, and connect this wire to a wire that you have run to the electric brake wire coming off the back side of your vehicle connector. I would recommend using the white wire included in the jacketed 2 wire # 10-2-1.

If you find that the 7-Way connector also needs power run to the 12v power lead pin, you can run a wire underneath your hood to the other auxiliary power post near the fuse block. You would install a 20amp fuse in the slot closest to this power post.

If the second auxiliary power post is already in use, you could also just run the power lead wire to the positive battery terminal and install a 40amp circuit breaker, part # 9510 if needed. If you used the white wire from the # 10-2-1, you could use the black wire to run your power lead.

You can view some more detailed information, as well as some close up pictures of the red and blue wire locations at the link provided.

expert reply by: Sarah L

0

Danny

4/7/2020

02 Silverado 2500I think Im on the right track ... Red wire with ring terminal - front post by trailer fuse Cut plug off blue wire and run a wire all the way to the rear of truck and connect to what exactly?

Reply

John H.

4/9/2020

The blue wire under the hood is coming from the brake controller port under the dash. If you do not already have a 7-way connector on your truck, then you will want to run a wire from that blue wire all the way back to a 7-way trailer connector like part # 37185 and connect it to the 5 o'clock pin which powers the trailer's electric brakes.

Reply

Answer 1

Under the hood of your 2001 Chevy Silverado, remove the cover on the power distribution box. If standing in front of the truck facing the motor, the brake controller fuse will be that last large one in the back left corner, see picture. But the…

view full answer...

Answer 2

If the lighting functions on your trailer connector are are functional, you'll probably need to install missing fuses in the power distribution box under the hood. On the inboard side of the fuse box, there are two threaded studs. The one…

view full answer...

Answer 3

This is not an uncommon situation for your generation of Chevy Silverado. If you remove the cover on the power distribution box, look for a row of larger fuses on the left side of the box (if facing the motor from the front of the truck). If there…

view full answer...

Answer 4

It is entirely possible that the blue brake output wire is not run from under the hood to the back of your 2002 Chevy Silverado. This was a common issue even on models that came with a factory tow package. Check under the hood between the fuse…

view full answer...

Answer 5

Thank you for being very detailed with your question! The first step I would take is to make sure everything on the truck and trailer is wired properly. Your Prodigy brake controller should have the wiring adapter #3025-P which is custom for your…

view full answer...

Answer 6

Typically, the tow package wiring is located along the frame rail or above the spare tire. The usual wire colors and their functions are as follows: Dark blue- brake controller output voltage Red or Orange- 12-volt accessory power Yellow- left…

view full answer...

Answer 7

Most GM trucks use a pretty standard wire color for their tow packages, but I always recommend testing for function, and not just color. If you follow the bundle back there should be more wires than the ones you mentioned, for a total of 8.…

view full answer...

Answer 8

If your Silverado has the factory plug located above the spare tire, the easiest way to install a 4-pole would be to use the Tow Ready #118384. Simply remove the protective cap covering the plug, plug in one of the connectors on the Tow Ready Harness…

view full answer...

Answer 9

In the tow package wire bundle located near the spare tire on your 2002 Chevrolet Silverado, there should be a darker blue wire to which you can connect the blue wire from your wire harness, #HM40975-11998, with a butt connector, #05732-2. If there…

view full answer...

Answer 10

There are a few possible reasons why the brake controller is not working when you step on the brake pedal. First, if it was working before but now it is not then the most likely cause is a blown stoplight or CHMSL fuse. Use the legend on the power…

view full answer...

Answer 11

We definitely have options available to add a brake controller to your 2002 Chevy Silverado C3500. You may need an extra part depending on if it came with a 7 Way from the manufacturer or not, but I have a good option for that as well. With that…

view full answer...

Answer 12

There are several ways that you can cut off the power to your trailer brakes. The easiest option would be to simply unplug your brake controller. If the brake controller is disconnected, the brakes will not receive power. If your brake controller was…

view full answer...