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'75 280Z Headlight Relay Upgrade


tamo3

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  • 6 months later...

Found good size relay box from Junkyard Toyota car.

From my schematic, I can just modify wiring within Engine bay.

 

post-24248-0-27119400-1432851018_thumb.j

post-24248-0-36255600-1432851013_thumb.j

post-24248-0-21090300-1432851024_thumb.j

 

It fits 3 relays and 1 30A fuse.

I can use 2 relays and 1 fuse for headlights and another relay for something else :-) Maybe radiator fan?

Edited by tamo3
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Before I finished up my relay upgrade, I was also looking for a pre-existing box to house the relays and some fuses.

 

Here's the best one I could come up with.  It's a pretty adaptable relay/fuse box from (I think) the later model of Corolla. I like it because not only does it have room for four relays, but it also has four of the mini blade fuses. This is the only pic I have handy right now:

P1040326_zpsgiawotxn.jpg

 

I'll try to snap a couple better pics of the box with the lid.

 

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Found good size relay box from Junkyard Toyota car.

From my schematic, I can just modify wiring within Engine bay.

 

attachicon.gifIMG_8303.jpg

 

It fits 3 relays and 1 30A fuse.

 

Hi Tamo,

 

Looks like it will make a nice clean setup when you finish. Be sure to take some photos when you fit it.

 

My headlights have been changed to meat european regulations and the PO upgraded to H4 with 60/55Watts bulbs. The original system uses 50/40Watts. I would like to do something like this to protect the combination switch now the system is using 20% more energy in high beam..

 

I have one small issue: The system will work on just one fuse. That means if it blows you will have no lights.

Could you double the relay bank for a left and right system. That way if a fuse should blow you will only loose the left or right (Hi and low beam) headlight. It would mean you will have two reserve relays for fog lights and fan etc.

I do a lot of HAZOPS, RCFA and FMEA where I work and its second nature to prepare for the worst.

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Hi Chas,

 

I was looking at Captains 4 relays schematics.

http://www.classiczcars.com/topic/51554-a-different-headlight-relay-upgrade-4-relays/?p=470544

 

However, your requirement is to have 4 fuses too.

 

So, I modify my schematics for you with just for fun:-)

post-24248-0-80546600-1432917476_thumb.j

 

I also replace with H4 headlight, but I'm not so much worry about safety issue since I'm not planning to drive at night...LOL!

 

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