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Zs-ondabrain ( 2  1 stars)
240Z Elec. Upgrade guy
Posts: 4,002
Registered: September 2003
Location: Marysville, WA. U.S.A.

240Z Headlight Relay Upgrade Harness


Quantity Views Date Posted
1 6282 Tue August 21, 2007


Asking Price Shipping Amount Condition Distance from you
$125.00 None Excellent
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These Headlight Relay Upgrade Harness are the ones that you've probably heard of here on this site. They are Plug-N-Play so there is NO cutting, drilling or modifying your stock harness. The HLH is universal on ALL 240Z's. It will allow you to upgrade to H4 lights without harming your wiring, fusebox or combo switch, which are the usuall victoms of melting and malfunctions when you upgrade headlights.

I use only OEM style connectors and terminals. The harness uses only OEM bolt and screw locations so it'll go right into your 240Z without problems. No more Dim or "yellowed" headlights and because Safety is the key, brighter lights allow you to see better and others to see YOU as well. The harness comes with full instructions and installs in about 15 minutes. I can be removed to put your Z back in STOCK order in the same amount of time without any problems.

I also make a PLH (Parking Light Relay Upgrade Harness) that is just as easy to instal and works on 240Z's up to 3/73'. It too is Plug-N-Play and will stop the melting of the 3rd fuse down on the right, in your fusebox. It will increase the brightness of the Dash lights, Side markers and Parking lights in the front and rear. The PLH is only $40 and a great compliment to the HLH (Headlight Relay Upgrade Harness)

Shipping is included in the price of each harness. I only take Money Orders made out to David W. Irwin and shipping and payment info can be aquired by writing me at

Thanks for looking.




Registered: June 2005
Location: North Georgia
Posts: 174
Comment Date: Thu October 25, 2007
I bought a set of headlight & tail light harnesses.

Finally installed them last night.

Very nice looking harness, very easy to install, and they really make your lights brighter.

This is a great deal.

I recomend this set for anyone.

Mark Dixon
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