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928 Owners Club Forum :: Topic: Adding Euro H4 headlights to a 85' US, questions... (1/1)
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TOPIC: Adding Euro H4 headlights to a 85' US, questions...

Adding Euro H4 headlights to a 85' US, questions... 07 Jun 2016 13:48 #19055


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  • jr928s's Avatar
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When adding the H4's do I (really) need to upgrade or add a wiring harness? I am assuming all 928's came with the same wiring and switch?

I know on Rennlist years ago it was a popular mod to buy a relay for 911's to keep the headlight switch from failing, regardless of what lights you were running. I drank the cool aid, bought one and never installed it.
It's been in my desk drawer for years! Never had a failed switch either from too much load. My daytime job is not in foreign car electrics, FYI.

Would like to hear from anyone who is running H4's on their car.
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Last Edit: 07 Jun 2016 20:31 by jr928s. Reason: add photos
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Adding Euro H4 headlights to a 85' US, questions... 09 Jun 2016 02:35 #19058


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The Euro lamps may require a different socket to fit the bulb. As I recall I added the socket for the Euro lamps and kept the socket for the US lamp so if I needed to go back to the US lamp it would be easy.

The Euro H4 headlamps require accurate set-up so you don't blind oncoming cars. Somewhere in my notes I have a diagram for the proper set-up if you need it.
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Adding Euro H4 headlights to a 85' US, questions... 09 Jun 2016 11:46 #19059


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My original three way matched it exactly. I think only the H5's require a plug "graft.' I do need to aim these things better. I have them close to where the old ones were hitting my back fence, but the light they throw is dramatically different. I don't know what kind of bulbs are in them because I bought these used, but they are seriously bright.
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