Electrical help.....anybody? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-18-2010, 03:13 PM
Thread Starter
Join Date: Mar 2010
Posts: 3
Electrical help.....anybody?

My wifes jeep died on her two days ago out of nowhere. It's a 98 wrangler 4.0and it turns over perfectly, but won't start. I replaced the crankshaft sensor and still nothing. After investigating i saw the F21 fuse in the power distribution center under the hood was blown. According to Haynes it's for the automatic shutdown relay. I switched the horn and asd relay and it still blows the fuse. I traced the wires leaving the pdc and found no damage or defects in the wires. No matter what i do turning over the motor causes the fuse to pop. Does anyone know why it might be blowing the fuse and if this would prevent the jeep from starting. Also she filled up her tank with gas a day before this happened and forgot to put the cap back on. Maybe air in the fuel line but highly unlikely seeing how the tank was completely full. Any advice is greatly appreciated. Thanks

jpharry is offline   Quote
Old 03-18-2010, 08:37 PM   #2
Join Date: Oct 2009
Location: San Jose Calif.
Posts: 1,006
Blown fuses are caused by shorts or overloads. The only thing I can suggest is to get a FSM and start tracing backwards.

03 RUBI is offline   Quote
Old 03-18-2010, 09:20 PM   #3

WF Supporting Member
Fweaky's Avatar
Join Date: Aug 2009
Location: Central Virginia
Posts: 2,230
The ASD connects battery voltage to the fuel injectors and ignition coil. I would check the wiring to these components as well as the fuel pump for a short.
Nothing is foolproof to a sufficiently talented fool.
Fweaky is offline   Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
2010 Sahara Unlimited Electrical Ghosts VinceG JK General Discussion Forum 1 03-18-2010 09:38 AM
Preventing Possible Electrical Problems Atthehop TJ Tech Forum 6 03-01-2010 06:26 AM
Fuel Pump or Electrical Problem? JumpinJack95 YJ Tech Forum 5 10-19-2009 10:48 AM
jeep stalled, no electrical brandonpaul YJ Tech Forum 2 02-24-2008 04:56 PM
Electrical question for a 99 - won't turn over Master Shake TJ Tech Forum 2 03-12-2006 02:31 PM

All times are GMT -5. The time now is 06:15 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.