post #1 of Old 01-27-2014, 04:48 PM Thread Starter
RenanMilk
Registered User
1998 XJ Cherokee 
 
Join Date: Jun 2013
Location: Deerfield Beach
Posts: 16
Fuel pump fuse blowing immediately

I've seen a few threads on this topic but none of them have the exact same symptoms as I.

My fuel pump fuse (#19 in the PDC) blows as soon as I plug it in, with the keys in the ON position. I tried a 20 amp fuse just to try and get home with no luck. I happen to have copper wire with me, so I tried using that instead of a fuse but my car still won't turn over. I've used copper wire before to get my car home but now it's not helping anymore. I checked the wire and plugs leading out from the pump. No corrosion or visible breaks/damage. I'm at my wit's end with this car. Any advice?

RenanMilk is offline  
post #2 of Old 01-27-2014, 04:50 PM Thread Starter
RenanMilk
Registered User
1998 XJ Cherokee 
 
Join Date: Jun 2013
Location: Deerfield Beach
Posts: 16
Also, I tried inserting a fuse with the pump disconnected and the fuse still blows immediately on contact.
RenanMilk is offline  
post #3 of Old 01-27-2014, 04:54 PM Thread Starter
RenanMilk
Registered User
1998 XJ Cherokee 
 
Join Date: Jun 2013
Location: Deerfield Beach
Posts: 16
Just did another test. I unplugged the fuel pump relay in the PDC and plugged in a fuse into #19 and the fuse didnn't blow.
RenanMilk is offline  
post #4 of Old 01-27-2014, 04:57 PM Thread Starter
RenanMilk
Registered User
1998 XJ Cherokee 
 
Join Date: Jun 2013
Location: Deerfield Beach
Posts: 16
Swapped the A/C motor relay with the fuel pump relay since it had the same part number but #19 still blows.
RenanMilk is offline  
post #5 of Old 01-27-2014, 07:38 PM
chris87xj
JF Admin
 
chris87xj's Avatar
1987 XJ Cherokee 
 
Join Date: Sep 2006
Location: 3rd rock from sun
Posts: 10,046
Sounds like you may have a power wire shorting to ground between the relay and the pump.

***Chris***

"You can set my jeep on fire and roll it down a hill,
But I still wouldn't trade it for a Coupe DeVille."


JeepForum.com/IndyORV@Redbird-SRA

COTY 2009

chris87xj is offline  
post #6 of Old 01-27-2014, 07:57 PM
CrazyJeepMan92
Registered User
2000 TJ Wrangler 
 
Join Date: Feb 2012
Location: Lebanon
Posts: 230
You Have a short to ground. Power takes the path of least resistance, and the fuse being your protection device blows when amperage is exceeded. trace the fuel pump wires looking for open copper wires. If you have a voltmeter near you (For S&G's) hook up the ammeter in series with the circuit, meaning pull the blown fuse out and put the ammeter wire pos and neg in two seperate holes. If the ammeter test wires and too thick to fit in the fuse holes use a paperclip and test off that. Doing this will give you the amperage which if exceeds the fuse rating (20A) mean short to ground. DO NOT PUT A HIGHER AMP FUSE IN! Like i said its a protection device which is protecting the fuel pump.

Trace all the wires making sure none are sliced or open. Use the volt meter again on OHMS, Disconnect battery (OHMMeter puts test with .5v so the battery will throw it off. Hook the Ohm meter up in series again and test for resistance. Remember when Resistance goes up amperage goes down and vise versa.

PM Me with any questions.

NATEF/ASE Certified
US Marine MOS: Diesel Mechanic
Fabricator/Mechanic Kool Kidz ATV
CrazyJeepMan92 is offline  
Reply

Tags
fuel , fuse , pump


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome