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sprinkles08
sprinkles08, ASE Certified Technician
Category: Chevy
Satisfied Customers: 21598
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Parking lights blowing fuse, Yes, 01 Chevy express, Yes

Customer Question

Parking lights blowing fuse
JA: Do all the fuses have the correct amperage for the circuits they're in?
Customer: Yes
JA: What is the model/year of your Chevy?
Customer: 01 Chevy express
JA: Are you fixing your Express yourself? What have you tried so far?
Customer: Yes disconnected trailer wiring
JA: Anything else you want the mechanic to know before I connect you?
Customer: dimmed dash lights completely new harness and bulbs in tail lights
Submitted: 2 months ago.
Category: Chevy
Expert:  sprinkles08 replied 2 months ago.

Hello and welcome to JustAnswer!

The fuse will blow either due to a short to ground or high current draw on the circuit. Assuming the bulbs are correct and nothing else is wired into the circuit then the problem is most likely a short to ground in the wiring.

Trailer wiring is a very common source of lighting circuit issues. I'm assuming you have an aftermarket harness and it was disconnected completely from the vehicle yet the fuse still blows?

Customer: replied 2 months ago.
That's correct
Expert:  sprinkles08 replied 2 months ago.

Did the problem start after an accident, after work was done, etc?

Customer: replied 2 months ago.
No work. Or accident. One brake bulb was out. I replaced it a week or two later the fuse started blowing on the parking lights
Expert:  sprinkles08 replied 2 months ago.

You replaced it with the correct part number incandescent bulb?

Customer: replied 2 months ago.
No. the owners Manuel called for a 3057 which is wedge base. I installed a 2057 which is supposed to be a lower wattage parking element
Expert:  sprinkles08 replied 2 months ago.

2057? That's a brass base round bottom bulb. How was that installed in a modern socket?

Customer: replied 2 months ago.
The owners Manuel was wrong. The bases were round. I have replaced both light wiring harnesses with new round ones because the old ones were rusted
Expert:  sprinkles08 replied 2 months ago.

When was that done opposed to the current issue?

Customer: replied 2 months ago.
I changed the wiring trying to fix the problem. I tried turning the dash lights off and the parking lights on and fuse still blew. The fuse may last two hours or 2 minutes. Very irregular
Expert:  sprinkles08 replied 2 months ago.

Has anything else been done that was not mentioned?

Customer: replied 2 months ago.
All rear parking bulbs are now 2057's
Expert:  sprinkles08 replied 2 months ago.

Has anything else been done that was not mentioned?

Customer: replied 2 months ago.
No
Expert:  sprinkles08 replied 2 months ago.

Can you post the VIN?

Customer: replied 2 months ago.
1GCGG25R611238685
Expert:  sprinkles08 replied 2 months ago.

Connector 202 is the large bulkhead connector under the dash on the left side. Can you disconnect this and see if the fuse still blows?

Customer: replied 2 months ago.
As I stated it has taken up to two hours. Its7:45pm and we are in the hurricane in Wilmington N C. How about tomorrow?
Expert:  sprinkles08 replied 2 months ago.

You can reply whenever you're able to.