Dash lights fuse keeps blowing?

2002 FORD F-150

156,000 MILES • 3.8L • V8 • 4WD • AUTOMATIC

DROVERSONE

MEMBER
1 POST

Dash lights went out, so I checked the fuse box inside the cab. It's a 5a fuse and like I thought it was popped. Now every time I put a new one in it, it immediately blows again. I assume it's a short somewhere but have no idea where to begin?

Feb 25, 2023 at 10:30 AM

STEVE W.

✓Experienced Mechanic
15,308 POSTS

The fuse feeds the dimmer module that is part of the main light switch. I would start by unplugging the light switch and then seeing if the fuse blows, then you would need to test the two circuits the dimmer feeds. As shown in the images it feeds out on the single row 205a connector. To test you can unpin the connector at pin 1 on the small connector. Then plug it in, if the fuse still blows you know the problem is on the light blue with black wire on pin 5. If the fuse doesn't blow then the pin 1 feed is the problem. If it is then go to the splice 242 and start testing there by separating the wires and testing one at a time.

https://www.2carpros.com/articles/how-to-check-wiring

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Feb 25, 2023 at 2:48 PM