1988 Jeep Cherokee would oil pressure sensor effect radio

BMD03170

MEMBER
1988 JEEP CHEROKEE
4 CYL
4WD
AUTOMATIC
150,000 MILES

Where to begin.I obvioulsy have a 98 jeep cherokee limited. I have it for a year and everything besides new brakes blah blah needed to be fix. One day I got an oil changed and my oil pressure sensor work along with lights radio. After the finished my oil change, they would me my oild pressure senor was broken and needed to be fixed. Funny how it worked before the did anything. Anyways, I didnt have money at the time so I just left it, Shortly after my fuse to my radio, cluster and interior lights popped. My friend tried to put a fuse back in not knowing what caused it, it did a little spark but went in, After my senor popped out or something cuz I had a major oil leak and the fuse popped again and wasnt worked since, Im going to get a sensor tomorrow, But is this the cause of the radio and everything else too? Are they connected? Sounds maybe theres a short, but if a buy a sensor and put it in will that be all it is too it.

4 Replies

CARADIODOC

MECHANIC
33,916 POSTS

The two things should not be related. A small spark when installing a new fuse is normal due to memory circuits charging up in the various computers.

In case I'm wrong, replace the sending unit, then the fuse. If the fuse blows again, we'll need to investigate further. Try to determine what happens when the fuse blows, and all the circuits that are affected.

If the interior lights include courtesy lights in the doors, check for broken / frayed wires between the door hinges.

Caradiodoc

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Tuesday, February 23rd, 2010 AT 3:23 AM

BMD03170

MEMBER
2 POSTS

Well we replaced the oil pressure switch/sensor today. And it wasnt the problem. The radio, interior lights and gauges don't work, light how fast your going, how much gas you have those thing. (Sorry I don't have any idea what things are really called, I let my guy friends do that work lol sorry) But when im out of gas, the light will come on, and when im in four wheel drive it will tell me full time, so the lights in the dashwork, its just the gauges and all the other things not working. On the door, the little lights for the window's lights up still so thats working. I went to a auto shop and they said they had no idea what it is without tearing everything about, I sense this is going to be a lot of money. Its a weird situation, I dont get how this would happen all of a sudden when everything so working find when I first got it and for the past 7 months still been fine until after my oil problem.

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Tuesday, February 23rd, 2010 AT 2:53 PM

CARADIODOC

MECHANIC
33,916 POSTS

Sorry to say I'm not familiar with the circuitry in your vehicle, but I can offer a hint in locating the problem. Temporarily replace the blown fuse with a small 12 volt light bulb such as a brake light bulb. Wires can be soldered to the tabs of a blown fuse, or terminals can be plugged into the fuse box and wires attached to the bulb.

With the bulb installed, you can flex wiring harnesses and move stuff around. The bulb will probably glow dimly, but it will get full normal brightness when the short circuit appears. One thing that always comes to mind is frayed wires between the door hinges. Squeeze and flex the rubber tube with the wires inside. Sometimes opening and closing the door will make the short appear.

The radio will likely not work properly with the bulb installed, and it should be turned off to make the change in bulb brightness easier to see.

Caradiodoc

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Tuesday, February 23rd, 2010 AT 9:01 PM

CJ MEDEVAC

MECHANIC
11,005 POSTS

I've been hanging out here a year or more, broke foot at work/ complications, answer stuff I know that my experiences may help. Something to do, learn stuff too. See my profile.

A good while back, in some of the older, days-gone-by Posts on RIGs of your type. SEVERAL had similar, puzzling problems as you.I remember wires stretched real tight, possible expansion and contraction issues, broke a wire (EZily soldered back w/ slack, after discovered).I'm sure they specified. UNDER or BEHIND rubber? Or plastic? Metal. "DEALEE AT BOTTOM". That the DRIVERS DOOR CLOSES OVER or BETWEEN DRIVERS SEAT and "DEALEE" under carpet or mat. You could maybe do a search (AT INDEX) here, THIS SITE, using " SOLDER"(ED) as a key word to locate Cherokee Post from past. Surely solder is not a frequent word here, may save you some time. Let me know progression, I let you search 1st, If NO-GO let me know I'll try

Love, Turddog

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Tuesday, February 23rd, 2010 AT 10:20 PM