Fuse #18 in the PDC keeps popping

1998 JEEP GRAND CHEROKEE
180,000 MILES • 4.0L • 6 CYL • 4WD • AUTOMATIC
Avatar
BRDAVIS104
  • MEMBER
  • 1 POST
Every time I turn the key to "run". It still turns over but won’t fire. It was working and driving fine up until this happened. Any suggestions to try and fix this? TIA
Dec 27, 2019 at 2:16 PM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
Hi,

Fuse 18 is responsible for several relays. I attached a pic below and circled the relays that are powered by it. We have two choices. First, remove each relay and check it (I will provide a link showing how) or two, pull one relay at a time and see when removed, which relay doesn't cause the fuse to blow.

Here is the link for testing relays. Additionally, I have added a couple others you may find helpful.

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

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

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

Let me know what you find.

Joe
Image (Click to enlarge)
Attached Media
Dec 27, 2019 at 2:57 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle