Fuse panel problem?

TYSTRUCK

MEMBER
1999 FORD RANGER
2.5L
4 CYL
2WD
MANUAL
192,000 MILES

I bought the truck listed above XLT this week. After bringing it home I realized there were no brake lights. Tested fuse was dead: but not a bad fuse. Replaced that (didn't test again). Replaced: both bulbs, brake stop switch at pedal, and fuse. After investigating the fuse area, I found out more than one fuse is not getting power. To be exact, fuse #'s 2, 3, 7, 8, 13, 24, 28, and 33 do not have power while the remaining fuses do. I don't know what else to try at this point, looking into all the dead fuse locations it affects a lot of objects on the truck. Makes me worry that it's going to overheat with the blower fan not working, and the heater blows cold air.

Friday, July 7th, 2023 AT 6:47 PM

3 Replies

JACOBANDNICKOLAS

MECHANIC
110,068 POSTS

Are these fuses all in the under-hood fuse box or the one in the truck? Also, I'm not finding a fuse 33. Could that be a typo?

If you are looking at the under-hood fuse box, several of these fuses aren't used or are for 4wd. I attached a couple of examples below. Also, if you are checking in the vehicle, many are powered via the ignition switch, so make sure that it is in the run position (engine off) when checking.

Let me know.

Joe

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Friday, July 7th, 2023 AT 9:51 PM

TYSTRUCK

MEMBER
2 POSTS

Yes, these fuses are located inside the cab. When I'm testing these fuses, I do have to have the key into the run position? I inserted a photo of the fuse box itself.

Each fuse I've tested under the hood passes. Although I have not tested the relays as I don't know how (yet).

To reiterate my problem: I have running lights, blinkers, flashers and reverse lights, but when the brake is applied no brake lights.

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Saturday, July 8th, 2023 AT 9:10 AM

JACOBANDNICKOLAS

MECHANIC
110,068 POSTS

Hi,

Checking a relay isn't difficult. Take a look at this link:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Some of the fuses do require the key to be in the run or start position.

Now, let's focus on the brake lamp issue. The brake lamp circuit is straightforward. We need power to fuse 13. Are you certain there is no power? If there isn't, then either we have a faulty fuse box or there is a wiring issue to it. Make sure the connector pins aren't pushed in further than they should be. Let me know.

Next, if you look at the pic below, it shows fuse 13. Power from that fuse goes directly to the brake lamp switch. The power supply wire is light green with a red tracer. Confirm power there.

The power out wire is light green. It should have power when the brake pedal is depressed which closes the circuit in the switch so the light will turn on. If there is power, confirm there is power out and let me know what you find.

Take care,

Joe

See pic below.

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