Electrical issue.

[jdogg4]

Electrical issue.

So Saturday I’m heading out the door to head out of town jump in the jeep won’t start no power at all. Lights not on everything unplugged nothing I could see drawing power. Over head lights off. Get the neighbor to jump start the jeep for me. Cranks over fine first crank no problems running the rest of my 40 min trip. Parked it under a street lamp and turned it off then back on no problems. I made sure nothing was on when I left it there. Came back 5 hours later DEAD no power. Jump started it with no problems. I get home turn of the jeep keys in hand and the fan is still going? I can’t get it to turn off. Played with all the controls and the fan just kept blowing. Keys are still in my hand at this point I put them back in fettle with the ignition and still won’t turn off. I hit the defrost and nothing hit the rear wiper and it turns off the fan. Crank the jeep on and the fan kicks back on turn it off it stays running tell I hit the wiper switch again. Left it off got up the next morning and it’s dead wont turn on. I don’t know jack about electrical stuff on cars. Any thoughts or Ideas on how I should proceed from here.

 

[xj^REMY]

jumping it gives the battery enough juice to start, alternator keeps it running & recharges the battery

the fan sounds like the likely culprit that's draining the battery... my guess would be the fan relay is shot... but also could be the temp switch

i cant explain y the wiper switch turns off the fan... off the top of my head, it somehow shares the circuit & these are switched on/off by opening the ground:dunno:

start with swappin in a new relay for the fan... also keep in mind, the repeated drain/recharge cuts a battery's life short

 

[jdogg4]

I pulled the battery and have it on a trickler in the garage to help save it for now. I have my old Toyota truck to drive for now won't have a chance to get into the switch change out tell tuesday maybe.

 

[Hypoid]

Which fan?

 

[jdogg4]

the internal blower fan controled from my dash not the under the hood cooling fan. Sorry guys.

 

[timmy80930]

First if in fact it is the fan on the driver side(it will be the electric fan)Yes it will stay on for a bit when you turn the key off.Its supposed to.The issue with no power randomly when it happens check battery for voltage with a good OHM meter I had a prob with an issue very simalar cleaned nuetral saftey switch and the PDC (power distrubution center)on the passanger side battery connect terminal and prob solved.
Hope this helps