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Parking lights blowing fuse, Yes, 01 Chevy express, Yes

Customer Question
Parking lights blowing fuse JA: Do...
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: 1 year ago.Category: Chevy
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Answered in 10 hours by:
10/8/2016
Chevy Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago
sprinkles08
sprinkles08, ASE Certified Technician
Category: Chevy
Satisfied Customers: 23,509
Experience: ASE Master and Advanced level certified. Factory trained with 17 years dealership experience
Verified

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?

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Customer reply replied 1 year ago
That's correct
Chevy Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago

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

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Customer reply replied 1 year 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
Chevy Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago

You replaced it with the correct part number incandescent bulb?

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Customer reply replied 1 year 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
Chevy Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago

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

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Customer reply replied 1 year 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
Chevy Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago

When was that done opposed to the current issue?

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Customer reply replied 1 year 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
Chevy Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago

Has anything else been done that was not mentioned?

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Customer reply replied 1 year ago
All rear parking bulbs are now 2057's
Chevy Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago

Has anything else been done that was not mentioned?

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Customer reply replied 1 year ago
No
Chevy Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago

Can you post the VIN?

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Customer reply replied 1 year ago
1GCGG25R611238685
Chevy Mechanic: sprinkles08, ASE Certified Technician replied 1 year 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?

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Customer reply replied 1 year 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?
Chevy Mechanic: sprinkles08, ASE Certified Technician replied 1 year ago

You can reply whenever you're able to.

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sprinkles08
sprinkles08
sprinkles08, ASE Certified Technician
Category: Chevy
Satisfied Customers: 23,509
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Experience: ASE Master and Advanced level certified. Factory trained with 17 years dealership experience

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