So you"ve upgraded your headlight harness... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**SOON2BLAZE** · 02-05-2012, 04:27 PM

Me to. Did mine about 5 years ago from Classic industries. Glad I did it. Now I need to replace the relay for the high beams. Anyone else had an issue with finding the relay? I did get a "maybe a mitsubishi MB 627 895 will work". Looks similar in the book, they also mentioned a Borg Warner R5008 and a Carquest 56-2054. No local retailer have any of these in stock. Thanks, Chris

Andy4639 · 02-05-2012, 04:41 PM

I used the same relays as the low beam. 12 volts is 12 volts. 30 amp relay. They are good for the 14 volts the alternator puts out.

**SOON2BLAZE** · 02-05-2012, 05:15 PM

Andy, hi I saw that they were the exact same, thats how I diagnosed the issue. Just looking for a replacement that is a direct fit. TR65 pm'd me this: My relay is a Song Chuan 804-1A-C1

Here is the spec sheet on it.

http://www.therelaycompany.com/datafiles/804.pdf

Here is an ebay listing for it ($3.60+$6.00)

http://www.ebay.com/itm/1pc-Car-Powe...-/140473712708

Of course you could splice in most any 30 amp automotive relay with the pigtail that goes with it.

Andy4639 · 02-05-2012, 10:03 PM

OK,
I used them from Radio shack ones. I did my own wiring connectors and all.

BobbyK · 02-06-2012, 01:01 PM

Just pick up a 5 spade one at your local parts store.
-1st, they are already in the U.S.(not Taiwan-->E-Bay)
-There only about $5.00 or less.
-Just don't use the 87a terminal.

Picked this Bosch one up at Napa.

.

.

rpmerf · 02-06-2012, 01:05 PM

thats the relay I used on my car and truck. Its a standard configuration.

**Already Gone** · 02-06-2012, 04:12 PM

I did mine 5 or 6 years ago and got used relays form a wrecked Dodge Caravan ( which I think the wrecker charged me a 1.00 each ) and everything still works as it should. THis is great upgrade for 15.00 worth of parts and 2 or 3 hours work.

red71cheyenne · 02-06-2012, 07:42 PM

hehe, I did this upgrade on the 71 and it didn't last 2 weeks. Had to unplug it all and go back to stock to even get the lights to come on. It was in Bremerton though and we all know how wet it is, think my relays might have gotten some moisture in them and fried. One day I'll go back through it and troubleshoot.

Bardahl · 03-20-2012, 06:03 PM

Help ! Upon further review??? I have a drivers side low beam on my 68 GMC, thats it, I replaced the other Low beam and checked the lights and all 4 worked, 3 days later and I~m back to 1 drivers side low beam? could it be relays?, these are aftermarket (metal cube relays w/only 2 terminals w/threadeds and nuts to connect the ring terminals too)??

Dingfodgy · 03-20-2012, 07:12 PM

Two terminal relays? Metal Cube? Are these horn relays? Definately sounds like the wrong components are being used. There are several write-ups on this subject. Just go to your local napa grab two 30amp 4-pole relays (Bosch, GE, Sylvania, Delco- it don't matter, 12v is 12v). Make sure to also put in a 20a inline fuse on the power wire from the battery- it's cheap insurance.

Bardahl · 03-20-2012, 07:24 PM

thx. will do the new relays.

02-05-2012, 04:27 PM	#1
SOON2BLAZE Account Suspended Join Date: Aug 2005 Location: Southern UT Posts: 906	So you"ve upgraded your headlight harness... Me to. Did mine about 5 years ago from Classic industries. Glad I did it. Now I need to replace the relay for the high beams. Anyone else had an issue with finding the relay? I did get a "maybe a mitsubishi MB 627 895 will work". Looks similar in the book, they also mentioned a Borg Warner R5008 and a Carquest 56-2054. No local retailer have any of these in stock. Thanks, Chris Attached Images

02-05-2012, 04:41 PM	#2
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: So you"ve upgraded your headlight harness... I used the same relays as the low beam. 12 volts is 12 volts. 30 amp relay. They are good for the 14 volts the alternator puts out. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

02-05-2012, 05:15 PM	#3
SOON2BLAZE Account Suspended Join Date: Aug 2005 Location: Southern UT Posts: 906	Re: So you"ve upgraded your headlight harness... Andy, hi I saw that they were the exact same, thats how I diagnosed the issue. Just looking for a replacement that is a direct fit. TR65 pm'd me this: My relay is a Song Chuan 804-1A-C1 Here is the spec sheet on it. http://www.therelaycompany.com/datafiles/804.pdf Here is an ebay listing for it ($3.60+$6.00) http://www.ebay.com/itm/1pc-Car-Powe...-/140473712708 Of course you could splice in most any 30 amp automotive relay with the pigtail that goes with it.

02-05-2012, 10:03 PM	#4
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: So you"ve upgraded your headlight harness... OK, I used them from Radio shack ones. I did my own wiring connectors and all. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

02-06-2012, 01:01 PM	#5
BobbyK Registered User Join Date: May 2000 Location: Petrolia,Ontario,Canada but working in Port Huron,Mi. Posts: 1,771	Re: So you"ve upgraded your headlight harness... Just pick up a 5 spade one at your local parts store. -1st, they are already in the U.S.(not Taiwan-->E-Bay) -There only about $5.00 or less. -Just don't use the 87a terminal. Picked this Bosch one up at Napa. . . __________________ 71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE

02-06-2012, 01:05 PM	#6
rpmerf Registered User Join Date: Feb 2011 Location: Parkville, MD Posts: 1,024	Re: So you"ve upgraded your headlight harness... thats the relay I used on my car and truck. Its a standard configuration. __________________ 1970 C20 Custom Camper - 350, TH350 1997 GMC Suburban 1994 Acura Integra GSR 1987 Dodge Daytona Shelby Z

02-06-2012, 04:12 PM	#7
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,108	Re: So you"ve upgraded your headlight harness... I did mine 5 or 6 years ago and got used relays form a wrecked Dodge Caravan ( which I think the wrecker charged me a 1.00 each ) and everything still works as it should. THis is great upgrade for 15.00 worth of parts and 2 or 3 hours work. __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

02-06-2012, 07:42 PM	#8
red71cheyenne Back in the sticks Join Date: Jan 2001 Location: Fordland, MO Posts: 3,188	Re: So you"ve upgraded your headlight harness... hehe, I did this upgrade on the 71 and it didn't last 2 weeks. Had to unplug it all and go back to stock to even get the lights to come on. It was in Bremerton though and we all know how wet it is, think my relays might have gotten some moisture in them and fried. One day I'll go back through it and troubleshoot. __________________ 1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty

03-20-2012, 06:03 PM	#9
Bardahl Registered User Join Date: Nov 2011 Location: Northwest Posts: 90	Re: So you"ve upgraded your headlight harness... Help ! Upon further review??? I have a drivers side low beam on my 68 GMC, thats it, I replaced the other Low beam and checked the lights and all 4 worked, 3 days later and I~m back to 1 drivers side low beam? could it be relays?, these are aftermarket (metal cube relays w/only 2 terminals w/threadeds and nuts to connect the ring terminals too)??

03-20-2012, 07:12 PM	#10
Dingfodgy Lemme show you something!! Join Date: Apr 2007 Location: St.Helens, OR. Posts: 876	Re: So you"ve upgraded your headlight harness... Two terminal relays? Metal Cube? Are these horn relays? Definately sounds like the wrong components are being used. There are several write-ups on this subject. Just go to your local napa grab two 30amp 4-pole relays (Bosch, GE, Sylvania, Delco- it don't matter, 12v is 12v). Make sure to also put in a 20a inline fuse on the power wire from the battery- it's cheap insurance. __________________ '67 CST-10 LWB ("Crusty") SOLD '67 GMC SWB ("Murdock") 2000 K1500 Suburban ("Betty") '95 BMW 325i ("Joy")

03-20-2012, 07:24 PM	#11
Bardahl Registered User Join Date: Nov 2011 Location: Northwest Posts: 90	Re: So you"ve upgraded your headlight harness... thx. will do the new relays.

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