Cutting in Headlight relays.

[jbgroby]

I need a bit of help on cutting in a 30 amp headlight relay. I discovered that when I hit my high beams after about 20 seconds that cut off, I learned that I was overloading the circuit. I was told I needed to add a relay inline to the dimmer switch. I was sent the drawing below. The drawing was cut off at the bottom by mistake. So I’m not sure what to do with pin 87a.

Also, do I need a relay for the low beams as well?

[The Rocknrod]

http://67-72chevytrucks.com/vboard/s...d.php?t=397695

[jbgroby]

thanks, I'll read up on it.

[karlbenz]

My harness was shot so I bought the whole set up from classic parts for bout $30. mine is a four headlight set up

https://www.classicparts.com/58-91-H...ctinfo/52-297/

[karlbenz]

Originally Posted by karlbenz

My harness was shot so I bought the whole set up from classic parts for bout $30. mine is a four headlight set up

https://www.classicparts.com/58-91-H...ctinfo/52-297/

heres the one for singles
https://www.classicparts.com/Headlam...ctinfo/52-298/

[jbgroby]

Thanks That takes all the real work out of it. I'll order it Friday.

Originally Posted by karlbenz

My harness was shot so I bought the whole set up from classic parts for bout $30. mine is a four headlight set up

https://www.classicparts.com/58-91-H...ctinfo/52-297/

[karlbenz]

Originally Posted by jbgroby

Thanks That takes all the real work out of it. I'll order it Friday.

Only issue with this is it uses a generic plug in at the firewall. It is not oem. I used a couple spade connectors. mine kept coming unplugged anyway. Hard to beat for $30 though. everything else fit great

[theastronaut]

Here's a diagram I made a few years ago to bypass the original wiring harness completely. The original harness only has to turn the relays on this way so they're very little load on it. No cutting or modifications to the original wiring harness this way.

[michael bustamante]

Originally Posted by theastronaut

Here's a diagram I made a few years ago to bypass the original wiring harness completely. The original harness only has to turn the relays on this way so they're very little load on it. No cutting or modifications to the original wiring harness this way.

hey bud you got diagram for four eyed system?

[theastronaut]

Originally Posted by michael bustamante

hey bud you got diagram for four eyed system?

I don't. The only difference would the wires to the headlight plugs, and that would depend on the type of low beam bulb you're running (low/high- two filament, or low only-single filament).

[The Rocknrod]

Originally Posted by theastronaut

Here's a diagram I made a few years ago to bypass the original wiring harness completely. The original harness only has to turn the relays on this way so they're very little load on it. No cutting or modifications to the original wiring harness this way.

Wish I had saved that image - it doesnt show up now.

[theastronaut]

Originally Posted by The Rocknrod

Wish I had saved that image - it doesnt show up now.

I'm still seeing it?

Try this link.

http://i557.photobucket.com/albums/s...essDiagram.png

[michael bustamante]

I don't think 87a is used at all for the relay conversion but id follow the diagram above, I did this on my 67 and the lights were a lot brighter

[The Rocknrod]

No - It flashes up like it wants to then goes away - the rest of the photobucket page adds etc are there, just no image.

[raidmagic]

Originally Posted by The Rocknrod

No - It flashes up like it wants to then goes away - the rest of the photobucket page adds etc are there, just no image.

It still shows for me. I saved it and uploaded it. Let me know when you save it so I can remove it. I'm not trying to take credit for anything.

[jbgroby]

PHOTOBUCKET sucks hind T**, they are blackmailing folks with a TON of pop up, I'll pay the fee then save everything to to Disk.

[61K10]

I bought mine off e-bay. good quality and cheaper than most.

[jbgroby]

Thanks

[rpmerf]

I did mine a bit different from what you have shown. It is closer to what they have done in some of the links. I used 2 relays - 1 for high beams, 1 for low beams. I put the relay under the hood on the drivers side fender, and grabbed the power from that junction block.

30 - Power from the junction block. Fused, 20A.
85 - Ground
86 - High or Low from the floor switch
87 - To the headlights

I replaced the wire between the relays and headlights. I used 16ga wire and new connectors for the headlights.

[The Rocknrod]

Updated the Firefox and now I see it - Strange.

[The Rocknrod]

So where did you buy the dual 87 relays? They are not just 87 and 87a but dual 87?

[theastronaut]

Been getting them from Del City. Good price and have been reliable so far. Both 87 pins are powered at the same time so use one relay for low beam and one for high beam to split power to the separate bulbs.

https://www.delcity.net/store/Dual-C...91795.h_791800



They also have un-wired relay sockets for making your own harnesses.

https://www.delcity.net/store/5-Pin-...90144.h_790150

[The Rocknrod]

Thanks.

[jbgroby]

I got the new harness in and called Classicparts to see if they recommended upgrading the headlight to halogen when I explained what was happening (lights go out after about a minute) he stated it was not a relay issue and the new harness would do nothing to help and would make it worse? WTH?? I have no problem ordering a new headlight switch and was going to do so as a matter of course (someone said that it should be changed) but I did not expect CP to say the harness would not work??

I'm lost......

[theastronaut]

Someone at Classic Parts didn't know what they were talking about.