Drummerboy4as Posted November 5, 2008 Report Share Posted November 5, 2008 I grew up in Victorville by the way...... GO JACKRABBITS!! :lol: Quote Link to comment
moparvwfreak Posted November 5, 2008 Report Share Posted November 5, 2008 I'm electrically challenged but I could make a trip to NAPA and give this a try... Might have some questions along the way, like will this work for my application? 1974 Datsun Truck? Ugh... Mike if you were closer to me i would do it for ya. its not hard to do at all. i personally ahve done teh relay system 3 times. works beautifully. and yes it will work for your application. it will work for ANY application. Quote Link to comment
Mike Phillips Posted November 5, 2008 Report Share Posted November 5, 2008 Are these electrical blades sticking out of the current relay what you're as referring to as #30, #85, #86 and #87 terminals? (I have it bolted back in place on the firewall so can't see if there are any markings on the housing for these numbers) Quote Link to comment
Drummerboy4as Posted November 6, 2008 Report Share Posted November 6, 2008 no, when you get the new relays the terminals will be labeled with those numbers. If I were you I would toss that old relay and go with the way beebani described. It'll save you a lot of headaches in the long run Quote Link to comment
Mike Phillips Posted November 6, 2008 Report Share Posted November 6, 2008 Get some wire, 12ga should work, get 2 in-line fuses (20-30amp), 2 40amp relays, and a few misc connectors. Wire the 2 in-line fuses to the + post on your starter or battery, run those wires to the #30 terminal on your relays For the low beam relay plug the red/black into terminal #87, run a ground to #85, and split the red wire that's plugged into your old relay plugging one lead into the #86 terminal For the high beam relay plug the red/white wire into terminal #87, red/yellow into #85, the other half of your red wire goes to #86 The red, red/yellow, red/black, and red/white should be the four wires that are plugged into your old relay, you may need to extend them. Okay, if I print this out and go to NAPA and ask for the above relays, they're going to be marked with those numbers? Sorry for being so electrically challenged, I'm not sure where these numbers are supposed to be located. "Just shoot me" :blink: Quote Link to comment
Mike Phillips Posted November 6, 2008 Report Share Posted November 6, 2008 FWIW Been working on this truck for about 2 months, drove it legally for the first time today with temporary tags. It's running really good and I have brake lights and tail lights, no blinkers yet and only high beam headlights. I unplugged the inner set of headlights so I can drive it without blinding people or getting a ticket, still working on the blinkers. Will try a new Flasher after I get off work and get to AutoZone. When I turn the blinkers on, the Headlamp relay clicks, are the blinkers also affected by the headlamp relay? Excited to drive this thing as soon as I can get it so it's safe and legal. Also buffed out the paint job, came out pretty nice. Not a bad looking parts chaser and commuter truck and it's all paid for. :) Quote Link to comment
jay cky Posted November 6, 2008 Report Share Posted November 6, 2008 I actually have pictures fuckface, just haven't loaded them yet. It's pretty simple though, and pics don't help much. hahahhaa Quote Link to comment
BEEBANI Posted November 6, 2008 Author Report Share Posted November 6, 2008 No Mike, the turn signals, markers, brake lights, tail lights, dome light, and dash lights are all on the same circuit and fuse. You need to get yourself a wiring diagram. Where are all the diagrams that were on the620.com these days guys? Quote Link to comment
Drummerboy4as Posted November 6, 2008 Report Share Posted November 6, 2008 No Mike, the turn signals, markers, brake lights, tail lights, dome light, and dash lights are all on the same circuit and fuse. You need to get yourself a wiring diagram. Where are all the diagrams that were on the620.com these days guys? They're on the "new" 620.com which is here Mike, you're just looking for your "average, run of the mill" relay, four terminals. On the bottom of the relay, next to the terminals is where they're labled Quote Link to comment
az_rat210 Posted November 13, 2008 Report Share Posted November 13, 2008 Using a Bosch Relay works well for quite a few circuits. I used one in order to pull a full 14.25 volts from the battery direct to the coil, up from 13.5 volts. It provides a hotter spark, better burn, more power and mpg. Quote Link to comment
Drummerboy4as Posted November 13, 2008 Report Share Posted November 13, 2008 Hmm, interesting. Care to elaborate on how you wired that up. I'd like to wire up about everything I can with relays. I was so impressed with the improvement with the head lights and the starter. Quote Link to comment
chebetio510 Posted October 15, 2011 Report Share Posted October 15, 2011 Yes it will work, I have a '73 and I did it. You don't necessarily have to put a new fuse panel under the hood, it just makes it cleaner. Get some wire, 12ga should work, get 2 in-line fuses (20-30amp), 2 40amp relays, and a few misc connectors. Wire the 2 in-line fuses to the + post on your starter or battery, run those wires to the #30 terminal on your relays For the low beam relay plug the red/black into terminal #87, run a ground to #85, and split the red wire that's plugged into your old relay plugging one lead into the #86 terminal For the high beam relay plug the red/white wire into terminal #87, red/yellow into #85, the other half of your red wire goes to #86 The red, red/yellow, red/black, and red/white should be the four wires that are plugged into your old relay, you may need to extend them. Doing this this weekend.. just wondering.. since i have my hid's connected now.. will this keep them on when i flash high beams.. On my 510, a friend electrician who passed..wired the 510 like that.. low beams on.. and when high beams all 4 on Quote Link to comment
1973blue620lady Posted October 26, 2011 Report Share Posted October 26, 2011 hubby gets to deal with this tomorrow. my truck is missing the HL relay all together. Quote Link to comment
moparvwfreak Posted October 27, 2011 Report Share Posted October 27, 2011 So I wired the wifes truck up exactly as said, and with the high switch OFF all 4, both high and low stayed on. With it in the high position, only the lows were on. But I found a solution to my spesific problem. A 5 pin relay to put in place of the original that will be used fir switching dutys just like the original relay. Quote Link to comment
kneesamo Posted December 18, 2011 Report Share Posted December 18, 2011 Hooked my truck up with this relay set-up yesterday, and it rocks. Wiring is still new to me, and I kept trying to conceptualize how to wire up relays with the existing switches, but kept drawing a blank. Then I found this post, and now I can see it all laid out in my head. Thanks Quote Link to comment
chebetio510 Posted August 1, 2012 Report Share Posted August 1, 2012 hey huys hoping i can bring this back.. i did this a couple moths back.. actually when this thread started.. and i am now having an issue .. The fusible link for the low beam relay keeps popping that fuse... cant seem to see anythin worng. havent changes anything rescently.. any ideas? Quote Link to comment
nandazifah Posted August 26, 2013 Report Share Posted August 26, 2013 Hi i am new member of this forum, i have old datsun 100a cherry, there was a mess up with wiring only headlights were working and it getting starts, i take off all other wires including head light now i rewire starting thing its is ok now i am going to install wire for headlights but i am confuse why we use relay in headlights even without relay it can work so what is usage of relay? Any one can explain please... Quote Link to comment
FatDatSun Posted February 12, 2022 Report Share Posted February 12, 2022 On 11/5/2008 at 3:07 PM, Drummerboy4as said: Yes it will work, I have a '73 and I did it. You don't necessarily have to put a new fuse panel under the hood, it just makes it cleaner. Get some wire, 12ga should work, get 2 in-line fuses (20-30amp), 2 40amp relays, and a few misc connectors. Wire the 2 in-line fuses to the + post on your starter or battery, run those wires to the #30 terminal on your relays For the low beam relay plug the red/black into terminal #87, run a ground to #85, and split the red wire that's plugged into your old relay plugging one lead into the #86 terminal For the high beam relay plug the red/white wire into terminal #87, red/yellow into #85, the other half of your red wire goes to #86 The red, red/yellow, red/black, and red/white should be the four wires that are plugged into your old relay, you may need to extend them. This is the answer to OP. Quote Link to comment
FatDatSun Posted February 12, 2022 Report Share Posted February 12, 2022 On 10/18/2008 at 7:02 PM, BEEBANI said: O.k., so after having to replace the fuses on both wires that feed the headlight switch several times, I decided to upgrade the headlight circuit. The fuses always melt, and the original fuse panel on the truck was completely melted away, so a long time ago I upgraded to a blade type fuse panel. I'm sure that going to H3's didn't help matters much either. The stock wiring is a fucking joke, battery power goes into the light switch, then goes to the light relay. The Red/Yellow wire coming from the high beam switch is used as a ground at the relay, and the Red/White and Red/Black wires from the relay feed the headlights. So essentially, there really is no point in the relay other then to trigger the high beams. I added in 2 40A relays and removed the original relay. I used the RED wire coming from the headlight switch as a trigger wire for both relays. I ran 2 new wires from my fuse block under the hood which is directly fed from the battery, I attached these to the relays as the B+ I ran 1 new ground wire for the low beam relay The Red/Yellow wire is attached to the high beam relay as a ground The Red/Black wire is the feed to the low beams The Red/White wire is the feed to the high beams Works like a champ, and I will later figure out how to wire a relay into the park light circuit (which feeds all the other lights including the tail lights). OP post is spot on. If you're confused it's you and not a type.o. Thanks for the simple shit in life. Quote Link to comment
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