High beams turn off low beams.

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Apr 18, 2021 | 03:37 PM

evil_goat

Thread Starter

Seasoned Member

Joined: Jan 2021

Posts: 324

Likes: 27

From: North North California

Year: 1992 with 260k miles

Model: Cherokee (XJ)

Engine: 4.0 Inline 6

High beams turn off low beams.

When I turn the high beams on, the low beams turn off. If I hold the stick forward(towards me), the high and low beams stay on resulting in the road being much brighter. Is it normal for the low beams to turn off once the high beams are on? If so, is there a way that i can have both turns on?
I have a 1991 jeep cherokee.

Apr 18, 2021 | 03:45 PM

Saudade

CF Veteran

Joined: Aug 2020

Posts: 2,141

Likes: 582

From: SoCal

Year: 1988

Model: Cherokee (XJ)

Engine: 4.0L

Yes, that's normal. If you have fogs lights (like I do), they also turn off on high beam.

Apr 18, 2021 | 07:14 PM

lawsoncl

CF Veteran

Joined: Dec 2017

Posts: 4,367

Likes: 1,215

Year: 1989

Model: Comanche (MJ)

Engine: 4.0

If you do a headlight harness (I recommend one regardless), you can add a diode between the high and low beam relay triggers so both kick on when you do the highbeams.

Apr 18, 2021 | 09:26 PM

BlueRidgeMark

CF Veteran

Joined: May 2012

Posts: 7,965

Likes: 964

From: Lost in the wilds of Virginia

Year: 1998 Classic (I'll get it running soon....) and 02 Grand

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by evil_goat

The existing headlight wiring is marginal. If you do anything to keep both on at the same time, you'll burn up the stock wiring or headlight switch in a hurry. Use an aftermarket headlight harness and you'll be fine with this mod.