Headlight Wiring Harness, is this good enough?

[Jim Haseltine]

http://homepage.ntlworld.com/jim_haseltine/quattro/tech/cables.html

My solution to Ur-q lighting. Six relays, six fuses. I'm looking into 
replacing the cables with ones with thinwall insulation, not only can these 
take higher currents they make the loom bundle a lot smaller.

Last week I lost _both_ low beam fuses at the same time - they didn't just 
blow, they melted the plastic of the fuse too.

Regards,

Jim Haseltine


----- Original Message ----- 
From: "Eric Sanborn" <eric.ql at sofadog.net>
To: "Matt Evans" <matt at mattevans.org>
Cc: <quattro at audifans.com>
Sent: Monday, November 15, 2004 1:11 AM
Subject: Re: Headlight Wiring Harness, is this good enough?


> Matt Evans wrote:
>
>>
>>One other comment - there is extra cost and complexity in running more
>>relays and fuses, but otoh, it is uh.. Non optimal if losing a single fuse
>>or single relay means you lose BOTH headlights.  The cats-meow setup is
>>separate fuses and relays for each primary bulb (i.e. 4 relays and 4 
>>inline
>>fuses to cover drivers low, drivers high, pass low, pass high). 
>>Separating
>>loads out like would let you get away with running more but smaller
>>conductors.
>
> I agree with Matt.  When I made my harness (for H4/H1 setup) I used a 
> relay for every filiment.  I only however used 3 fuses instead of six.  I 
> seem to think that I did the fuse stuff wrong since I paired off running 
> lights together.  You could likely fuse each side of the car separately 
> and get the redundancy you need. You shouldn't (like noted in an earlier 
> post) need high and low at the same time for more than a second.
>
> Just to put a vote in I used 12 gauge and a combination of 30 and 40 amp 
> relays as I was scavaging from harnesses out of other cars.  I am still 
> running stock wattages since I had the bulbs already.  As they go I will 
> upgrade.  I ran H4s with the same setup in my Rabbit for 4 years with 
> 80/100 bulbs and no ill effects.
>
> -- 
> Eric Sanborn
> '85 4ktq
>
> http://sofadog.net/4ktq/
>
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