IGN E fuse blowing

Tiny
ZACKMCCONNELL1
  • MEMBER
  • 2005 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 247,000 MILES
I’m having a problem with the IGN E fuse blowing on my vehicle listed above. I’ve tried everything I know to do I’ve looked for loose/frayed wires that could be coming in contact with metal causing it to ground off I’ve found nothing. The only that that I have found is when I checked the neutral safety switch I unplugged it and cleaned it off because it has some oil that got into it and when I plugged it back in and out a fuse back in the truck crank up. When the fuse blows it causes the tachometer to not work and the lights on the dash goes out. But before I checked the safety switch no matter how many fuses I put in it it didn’t crank, but when I unplugged it and cleaned it off and plugged it back in the truck crunk right up? I’m lost. Someone please help if possible.
Monday, February 1st, 2021 AT 6:30 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good morning,

I attached the fuse control diagram for you to view.

There are 3 things for that fuse. The cluster, the multifunction switch and the neutral safety switch.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

You need to disconnect all 3 components and see if the fuse still fails. If it does, it is a wiring harness issue.

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

If it does not, then plug back in one at a time until the fuse fails. This sounds like the dash cluster has failed.

Roy

INSTRUMENT PANEL CLUSTER (IPC) REPLACEMENT

REMOVAL PROCEDURE
1. Remove the instrument panel cluster (IPC) trim plate bezel.

imageOpen In New TabZoom/Print

2. Remove the screws that retain the IPC to the instrument panel (I/P) assembly.

imageOpen In New TabZoom/Print

3. Remove the IPC (2) from the vehicle by tilting the bottom of the cluster outward.
4. Disconnect the IPC harness (1) from the IPC.

Park/Neutral Position Switch Replacement

Tools Required
- J 41364-A Park Neutral Switch Aligner

Removal Procedure

imageOpen In New TabZoom/Print

1. Apply the park brake.
2. Shift the transmission into neutral.
3. If equipped with 4-wheel drive (4WD), remove the front propeller shaft.
4. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
5. Disconnect the park/neutral position (PNP) switch electrical connector (2).

imageOpen In New TabZoom/Print

6. Remove the manual shaft lever nut.
7. Remove the transmission control lever from the manual shaft.
8. Remove the PNP switch bolts.
9. Remove the PNP switch from the manual shaft. If the PNP switch did not slide off the manual shaft, file the outer edge of the manual shaft in order to remove any burrs.
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Tuesday, February 2nd, 2021 AT 3:48 AM
Tiny
ZACKMCCONNELL1
  • MEMBER
  • 2 POSTS
Thank you, but I have a few questions. The only way I know of the fuse blow if is I drive it, because it will usually blow when I hit a bump. But yes my tachometer stops working and the light on my cluster goes off. It only does this when the fuse blows through.
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Tuesday, February 2nd, 2021 AT 10:51 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Okay, then disconnect the cluster and drive it over bumps and see if it fails.

Roy
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Tuesday, February 2nd, 2021 AT 12:41 PM

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