Best wiring layout for rollbar mounted off-roadlights? - Defender Source
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  #1  
Old January 23rd, 2011, 09:39 PM
Knife90
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john sabra
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Best wiring layout for rollbar mounted off-roadlights?

I"m looking for advice on how best to layout the wires/relays/switch/power wiring for 4 Hella50's mounted on the rollbar. Definitely a frustrating thing to try and figure out, but cant find a thread laying out a diagram. I bought a Hella wiring harness, which seems like more of a pain to deal with than its worth, and too bulky.
Specifically I'm trying to figure out best and neatest way to come off the roof with wiring access to the battery compartment and placing a dash mounted switch.
1. Where should the relays go?
2. Is the B-pillar best way to come down from roof in to batt compartment?
3. Should the switch wiring come down A-pillar to get to dash, or run under from batt compartment?
4. Best way to run 2nd power wire to accessory panel light switch?

If anyone has a link to direct me to that'd be great.
....or, if you're in Austin and can recommend good place to get this done "professionally", I'm willing to pay for it, as i'm beginning to think I bit off more than I can chew.
Thanks guys.
John
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  #2  
Old January 23rd, 2011, 10:38 PM
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RoverNC
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James Wortman
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Here's a link to get you started:

http://www.defendersource.com/forum/...ighlight=hella

Are you heading to SCARR in April?
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  #3  
Old January 24th, 2011, 08:20 AM
Knife90
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john sabra
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thanks, will take a look.
planning on SCARR for sure unless work gets in the way!
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  #4  
Old January 24th, 2011, 08:37 AM
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tebby
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Justin Tebbenkamp
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Bolt size for the light tabs are 8mm x 1.25 pitch...(thanks mike @ecr)
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  #5  
Old January 24th, 2011, 01:44 PM
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Dave Sherwood
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Quote:
Originally Posted by Knife90 View Post
If anyone has a link to direct me to that'd be great.
....or, if you're in Austin and can recommend good place to get this done "professionally", I'm willing to pay for it, as i'm beginning to think I bit off more than I can chew.
Thanks guys.
John
This is definately something you can do yourself...it is very easy....

I can post more details if you need it.

I ran all of the wires down the roll cage in black wire loom and into a gap between the hood and the firewall...no drillilng and you can not see them.

I also extended all of the grounds to get a good ground instead of grounding to the roll cage.

I ran 4 guage wire from the battery to a post under the hood (drivers side fender) and connected all the relays under the hood.

You can then run the switch wires through the bungin the dash that the speedo, etc goes in.

You can then get ignition switched power for the switches from the fuse box.

Here are some simple pics:
http://www.defendersource.com/forum/...ad.php?t=25754



Dave
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  #6  
Old January 24th, 2011, 04:16 PM
Knife90
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john sabra
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Dave, thanks. If you have any more pics i'd appreciate it.
1. did you splice all the grounds into one wire on the cage, and then just run one ground wire into the engine bay? or run 4 grounds into the bay?
2. is it best to use 2 relays for the 4 lights? or could i get away with one?
3. what do i hook the purple Hella harness wire into if i choose not to link up with the high beams? my preference is to be able to turn the aux lights on even w/o the parking lights or reg lights on, with the ignition key in position two. is that possible?

thanks for any/all advice.

John
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  #7  
Old January 24th, 2011, 05:01 PM
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DMSLongLake
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Dave Sherwood
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I ran 4 separarte grounds.
Use 2 relays (some use 4...but that is overkill IMHO)
Hook it to the ignition powered source that you use for the switch. this will draw very little so you can splice all of them to one. I have them on my high beams so I don't accidentally melt the covers...
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Current Rovers:
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2006 LR3
2016 RRS

Past Rovers:
1997 Disco I
1988 Range Rover 40th Anniversary
1999 Disco II
1995 D-90 ST #2731
1997 Range Rover 4.6 HSE Vitesse
2003 Range Rover HSE
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2013 RRS
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  #8  
Old January 25th, 2011, 09:04 AM
Knife90
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john sabra
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Thanks, that definitely helps straighten some things out in my head.
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