Jeep cherokee headlight flickering problem

[texicanz 10+ year member]

When i turn up my radio in my 2000 jeep cherokee the headlights and the interrior lights flicker & i only have a mbquart dsc480 amp & i did the big 3 with 4 gauge wire and i add extra ground to the amp and the alternator was tested and good and im still having the problem any help be apperciated

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[Boomin_tahoe 5,000+ posts]

Might need 2 gauge wire instead of 4. Any idea what the original wire gauge was before you changed the big 3? Also.....where is your gain set at on the amp?

 

[Mayhem]

That amp should not be drawing enough curring to dim your headlights.

You have an older vehicle so I would check your battery.

 

[jeepdude95]

When i turn up my radio in my 2000 jeep cherokee the headlights and the interrior lights flicker & i only have a mbquart dsc480 amp & i did the big 3 with 4 gauge wire and i add extra ground to the amp and the alternator was tested and good and im still having the problem any help be apperciated

Heres a piece of info on the infamous cherokee headlight probs. The factory wiring *****!!! Huge power loss in just the factory wiring alone, add that to any voltage drop at all and you end up with flashing/dimming headlights. Heres what i did to check my heep for this problem. Start it up, turn the headlights on and use a multimeter to check dc voltage at the bulb, I had to remove the bulb, then plug it in and let it hang so i could probe the backside of the plug. It should be pretty close to the same voltage as the battery itself. But on mine (and most others ive checked) i had 11.4vdc to the bulb when the battery was showing 14.1!!!! How did i fix it? I rewired it. I used two 30amp relays, one for the low beam and one for the highbeam, and 10g wire to the bulbs with cheap autozone headlamp plugs. The difference was night and day. I had 13.9 to the bulbs afterwards. And the brightness of the bulbs was unreal. A very worthy upgrade in my book.

 

[jeepdude95]

Any one rewire there headlights? - JeepForum.com check out that post. (If sharing info from another forum is not allowed then please delete.)

 

[texicanz 10+ year member]

I have a new interstate battery and my volatge meter reading 14.3 volts while running

 

[texicanz 10+ year member]

I end up adding 2 gauge to all the grounds and still the same issue and i lower the gain and i still notice little less flickering

 

[texicanz 10+ year member]

My interrior lights flicker too when volume is turn up

 

[jeepdude95]

My interrior lights flicker too when volume is turn up

the interior lights are powered by the headlight switch. Test the voltage at the headlights, or pull the dome light bulb and test it there with the jeep running and ill bet its less than ideal.

 

[texicanz 10+ year member]

I check the headlight voltage and its 11.3v

 

[texicanz 10+ year member]

Thanks for the help i found a harness kit upgrade for 10 bucks on ebay

 

[jeepdude95]

Thanks for the help i found a harness kit upgrade for 10 bucks on ebay

Thats a good deal.

 

[The Camry]

Headlighta dim because voltage is being lowered faster than it can charge. Adding bigger wires helps ease the electrical systems bu allowing more current to flow freely which...drains more voltage.

Add another battery or get a HO alt

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