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Old 09-30-2015, 07:13 AM   #1
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chawkins99's Avatar
Join Date: Dec 2012
Location: Calera, AL
Posts: 466
Dim headlights - Fixed

There have been numerous threads in the past concerning poor/dim headlights. I wanted to share my solution.
In the past, people have blamed cheap headlight units from china, clouded lenses and inadequate wiring.
I replied to a thread back in December 2013 saying I had purchased a headlamp relay kit from Daniel Stern Lighting Consultancy and Supply
I installed it a couple of weeks later but haven't had the opportunity to test it as I don't normally travel in the dark.
Well, this morning, I had to take the coach for her annual oil change and although I live half a mile from the local Camping World, I just couldn't bring myself to go there so booked it in to a truck service place about 30 miles away. This meant leaving at 6am in the dark.

WOW! what a difference

Before, it was difficult to even tell the lights were on and main beam didn't improve it much. Now, I can see the road ahead and main beam illuminates half a mile or more ahead.

What their kit does is by-pass the inadequate (40ft) wiring and the headlight switch. In addition, when main beam is active, it keeps the low beam on as well.

In my case, I connected the power feed to a large half-inch 12-volt terminal in the front compartment.

As an aside, last year I also replaced the headlight switch to fix the dash lighting. That MAY have been contributing to the previous problem (no way to be sure).

I am VERY pleased with the results

Chris, Jo & Dell (Siberian Husky - 110lb of fur and muscle)
2003 Beaver Santiam 40DST - Cummins 330ISC
Closely followed by a 2012 Equinox AWD
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Old 09-30-2015, 08:59 AM   #2
Senior Member - DIYer
Waiter21's Avatar

Ford Super Duty Owner
Join Date: Nov 2014
Location: NW Ohio
Posts: 3,918
Good idea. I've ran across this when I was researching why my DRLs never turn off. The power for my headlights goes throu about 700 switches and relays and the voltage losses are probably substantial.

Looks like you just signed me up for another project on my Mirada

1999 Fleetwood Southwind 35S (Ford F53 6.8L V10) - Toad 2003 Saturn Vue.

It won't do MACH 2, but I can get a sandwich and take a pee.
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Old 09-30-2015, 11:04 AM   #3
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Monaco Owners Club
Join Date: May 2012
Location: DFW, Tex-US
Posts: 5,032
Thanks !

We have done that on a few different cars in the past...
so far haven't researched it for the coach... may need to !

(replacing factory wiring with just a trigger circuit and coming straight from the battery)
'11 Monaco Diplomat 43DFT RR10R pushed by a '14 Jeep Wrangler JKU. History.. 5'ers: 13 Redwood 38gk, 11 MVP Destiny, Open Range TT, popups, vans, tents...
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Old 09-30-2015, 02:45 PM   #4
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Tiffin Owners Club
Join Date: Sep 2013
Location: DFW, Texas
Posts: 2,074
I did the same thing with my old Itasca last year. The voltage at the headlights with the engine running was about 11.6 volts. After the relay was installed, they measured 14.1. The light output was doubled according to a digital light meter.
Dan & Ro with two Rescued Boston "Terrorists" Jade & Jewel
2017 Phaeton 40IH Maroon Coral - Power Glide Chassis with IFS (05/17)
Previously '15 Tiffin Allegro RED 38QRA and '06 Itasca Sunrise 35A
'12 Jeep JK Wrangler Sport and/or '08 Honda Goldwing
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Old 09-30-2015, 02:55 PM   #5
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Ford Super Duty Owner
Join Date: Jun 2015
Location: Ada, MI
Posts: 143
Wow. I never would have guessed it made that much difference.
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light, lights

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