Fog lamps - no voltage

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Oct 23, 2019 | 06:52 PM

riverside

Thread Starter

Junior Member

Joined: May 2018

Posts: 72

Likes: 1

From: Riverside CA

Year: 1992

Model: Cherokee (XJ)

Engine: 4.0

Fog lamps - no voltage

I am not getting voltage to either front lamp. Headlights on, low beam, indicator light is on, but no voltage. I surmise the fuse for the lamps is listed as "front lamps" (#15 in manual). 30 amp fuse looks good (rear lamps work, i.e. back-up lights).
Next step suggestion?

Last edited by riverside; Oct 23, 2019 at 07:32 PM.

Oct 24, 2019 | 05:42 AM

dave1123

Old fart with a wrench

Joined: Nov 2010

Posts: 14,398

Likes: 740

From: Manlius, east of Syracuse, NY

Year: 2000 XJ Sport & WJ Laredo

Model: Grand Cherokee (WJ)

Engine: 4.0L

Oct 24, 2019 | 03:23 PM

riverside

Thread Starter

Junior Member

Joined: May 2018

Posts: 72

Likes: 1

From: Riverside CA

Year: 1992

Model: Cherokee (XJ)

Engine: 4.0

For a 1992 XJ, 4.0, 4WD

Oct 24, 2019 | 03:29 PM

dave1123

Old fart with a wrench

Joined: Nov 2010

Posts: 14,398

Likes: 740

From: Manlius, east of Syracuse, NY

Year: 2000 XJ Sport & WJ Laredo

Model: Grand Cherokee (WJ)

Engine: 4.0L

That's the only one I've got. I thought it would help. Guess not.

Oct 24, 2019 | 04:55 PM

boxburn

CF Veteran

Joined: Oct 2018

Posts: 1,577

Likes: 279

From: United Kingdom

Year: 1995 RHD

Model: Cherokee (XJ)

Engine: 4.0l

From the 93 FSM:

Quote:

Foglight Relay Behind left head light, on wheelwell.

This relay may be there on a 92 but I have a 95 with no fog lights so couldn't check for you.

Oct 24, 2019 | 06:03 PM

riverside

Thread Starter

Junior Member

Joined: May 2018

Posts: 72

Likes: 1

From: Riverside CA

Year: 1992

Model: Cherokee (XJ)

Engine: 4.0

Would Jeep have put in the wiring without a relay?

Oct 24, 2019 | 07:19 PM

97grand4.0

CF Veteran

Joined: Nov 2015

Posts: 2,856

Likes: 201

From: syracuse ny

Year: 1997

Model: Grand Cherokee (ZJ)

Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims

Assuming you have an XJ the problem is in the fog light switch itself. Notorious for it. Much written on this and other forums about it.

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Oct 24, 2019 | 08:11 PM

riverside

Thread Starter

Junior Member

Joined: May 2018

Posts: 72

Likes: 1

From: Riverside CA

Year: 1992

Model: Cherokee (XJ)

Engine: 4.0

Got voltage now. Replacing a 15 amp fuse in the engine bay fuse box now gives me 12v.
But if I hook up directly I fear the fuse will blow again (since only 15 amp for both).
Still wondering about that relay, is this it?
But if I have 12V, then the relay and switch are working, yes?