DDM Tuning 400ex HID how-to

[mfive]

whats the point of the two relays? why not just wire one ballast to the "low" wire and the other ballast to the "high" wire. then you have a low/high functionality.

whats the point of the wire going straight to the battery for highs? is there an advantage there?

[dsm_racing]

I don't have much time, so here is the short answer.

whats the point of the two relays? why not just wire one ballast to the "low" wire and the other ballast to the "high" wire. then you have a low/high functionality.

If you wire one ballast to high and the other to low then you only ever have one burning. One will burn on high and the other on low. You don't get low/high functionality. You get low/low functionality. If you ever wire the two together then both burn all the time and you get high/high. In order to burn one on low and both on high you need the relays.

whats the point of the wire going straight to the battery for highs? is there an advantage there?

It keeps from overloading the factory harness with both burning. Both ballasts together pull more power than the factory harness is designed for.

[mfive]

I don't have much time, so here is the short answer.



If you wire one ballast to high and the other to low then you only ever have one burning. One will burn on high and the other on low. You don't get low/high functionality. You get low/low functionality. If you ever wire the two together then both burn all the time and you get high/high. In order to burn one on low and both on high you need the relays.

I see what you mean here. Basicallly if you wire one to low and one to high, you always just get one light. That makes sense. I must have been having a blonde moment.

It keeps from overloading the factory harness with both burning. Both ballasts together pull more power than the factory harness is designed for.

I see. So just a ring terminal on the battery connection, what guage wire would you run? And then just an inline 20a fuse? I think this sounds the safest from your description.

Thanks for all your help!

[mfive]

Can someone help a brother out and post a pic of their headlight housing? I can't find a good pic from google-searching. I just got my DDM kit in, and I think my headlight housings are missing something (previous owner already had the headlights torn apart, so I'm trying to fix all his f-ups.

Anyway, see the attached pic. What screws into those two holes in each headlight socket? What do I need to order? Do I need the harness (as in, part #3 at this link: http://www.partzilla.com/parts/searc...7)/parts.html)

I'm curious what a complete headlight looks like...

Here's mine:
IMG_20140323_113748016.jpg

[Stickman400]

Hmmm, that is an interesting pickle you're in there. I think that there is a metal plate that screws over that hole that your bulbs go into, then you turn them to lock them in, but you can't order just that plate because it's part of the housing. I'm not positive though. If I remember I'll look at my other headlight housing I have that is the same style and see what is up.

[mfive]

Hmmm, that is an interesting pickle you're in there. I think that there is a metal plate that screws over that hole that your bulbs go into, then you turn them to lock them in, but you can't order just that plate because it's part of the housing. I'm not positive though. If I remember I'll look at my other headlight housing I have that is the same style and see what is up.

Well crap. Guess I'm going to have to figure something out. What a PITA! Thanks for your help. Much appreciated.

[Zakradu398]

It indeed has a small metal plate that screws in, it's notched out so the light can screw and lock in.

[cheater13]

I just got some of those Tusk white bulbs for now until I wanna mess with the HID kit.