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 Bear with me: relay wiring help needed
#720565
05/02/06 08:56 PM
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Joined: Jun 2001
Posts: 1,365
OP
Body Damage is Cool
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In the absence of directions... Trying to wire up 2 100w off road lamps that Matt sells. I'm trying to get the relay working, but confused. <img src="/forums/images/graemlins/zombie.gif" alt="" /> ![[Linked Image]](http://www.planetbantz.com/imghost/isuzu/050206relay.jpg) I think this is the way it works, but I have a question: what about the pole in the center? From looking at other relays, it would seem that the two parallel poles in the center would have power running to them when the dash switch is thrown. Instead, it's one or the other when the dash switch is thrown. Second set of questions: if I have to have both lights running off that bottom pole, is a 30A fuse on the top side (close to the battery) pretty much the right for this job? Thanks... - mike
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Re: Bear with me: relay wiring help needed
[Re: sweater]
#720566
05/02/06 09:25 PM
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Joined: May 2002
Posts: 671
Rock Warrior
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trying to get the relay working, but confused. <img src="/forums/images/graemlins/zombie.gif" alt="" /> Try this link. http://www.partsexpress.com/resources/relays.htmlShould explain things pretty well. As far as the fuse, Amps = Watts / Volts, so if you have 200 W of lighting in the circuit divided by 12 V you come up with 16.66 Amps, so the 30 A fuse should be fine. Good luck, Jay
1991 Trooper - DEAD! 2.8 V6, 5 spd, 4WD, HD clutch, 2.25" exhaust, EPROM Chip, KC/Hella, Aisin hubs, Rancho 9000X's, Panasonic/Infinity/Alpine My Pics
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Re: Bear with me: relay wiring help needed
[Re: sweater]
#720567
05/02/06 09:30 PM
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Joined: Oct 2001
Posts: 4,016
Isuzu Moderator
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Does that relay have the numbers printed by the pins like the aftermarket Bosch ones do (or at least a lay-out sheet with the pins labelled)? If so, wire a 12v constant (fused for safety of course) to pin 30, next wire the lights' positive wire to pin 87, ground pin 85 on the relay, and ground the lights' negative wire, next wire pin 86 on the relay to the on/off switch you are using for the lights. [edit]Eh, beaten to the punch by Jay. And he even supplied pictures... talk about being outclassed <img src="/forums/images/graemlins/lol.gif" alt="" />
Last edited by strawmyers; 05/02/06 09:32 PM.
Sean Strawmyer Back and ready to rock...... crawl. From Indiana or surrounding states and interested in wheelin'? Check out www.mwior.com
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Re: Bear with me: relay wiring help needed
[Re: strawmyers]
#720568
05/02/06 09:39 PM
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Joined: May 2002
Posts: 671
Rock Warrior
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[edit]Eh, beaten to the punch by Jay. And he even supplied pictures... talk about being outclassed <img src="/forums/images/graemlins/lol.gif" alt="" /> Nah, I just remembered a similar discussion a while back and searched until I found the link again... Besides, at least wiring is something I know a little bit about...*I* feel so outclassed by most of the stuff folks are doing here, it's nice to find a topic where I might be able to contribute something... Jay
1991 Trooper - DEAD! 2.8 V6, 5 spd, 4WD, HD clutch, 2.25" exhaust, EPROM Chip, KC/Hella, Aisin hubs, Rancho 9000X's, Panasonic/Infinity/Alpine My Pics
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Re: Bear with me: relay wiring help needed
[Re: Pyro4117]
#720569
05/02/06 09:44 PM
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Joined: Jun 2001
Posts: 1,365
OP
Body Damage is Cool
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Yep - ask a detailed question and ye shall receive. My relay does have those markings...That link with these pictures said it all. Relay at rest: ![[Linked Image]](http://www.partsexpress.com/resources/relayatrest.gif) Relay energized: ![[Linked Image]](http://www.partsexpress.com/resources/relayenerg.gif) That now explains why I was getting power to one light, then the other, when I had the lights hooked up to 87 and 87a. So, now I just have to splice the two lights wires together to one connector and finish the dash switch wiring. Thanks, guys!!! - mike
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Re: Bear with me: relay wiring help needed
[Re: sweater]
#720570
05/02/06 10:10 PM
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Joined: Jul 2001
Posts: 1,957
Body Damage is Cool
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Yep - ask a detailed question and ye shall receive. My relay does have those markings...That link with these pictures said it all. Relay at rest: Relay energized: That now explains why I was getting power to one light, then the other, when I had the lights hooked up to 87 and 87a. So, now I just have to splice the two lights wires together to one connector and finish the dash switch wiring. Thanks, guys!!! - mike Exactly Mike, these guys hooked you up pretty well. 87a is N/C (Normally Closed) while 87 is N/O (Normally Open). 87 is wher eyou want to be with the lights, when you energize the relay it will latch open thus, turning the lights on, while turning off whatever is connected to 87. So, it is very possible to have two devices hooked up to this same relay, although not standard practice. Ive utilized that scenario a lot for alarms, etc...
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Re: Bear with me: relay wiring help needed
[Re: sweater]
#720571
05/02/06 10:13 PM
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Joined: May 2001
Posts: 1,628
Body Damage is Cool
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In the absence of directions... Trying to wire up 2 100w off road lamps that Matt sells. I'm trying to get the relay working, but confused. <img src="/forums/images/graemlins/zombie.gif" alt="" /> I think this is the way it works, but I have a question: what about the pole in the center? From looking at other relays, it would seem that the two parallel poles in the center would have power running to them when the dash switch is thrown. Instead, it's one or the other when the dash switch is thrown. Second set of questions: if I have to have both lights running off that bottom pole, is a 30A fuse on the top side (close to the battery) pretty much the right for this job? Thanks... - mike Here you go the best website that I have ever found on this subject. http://www.classictruckshop.com/clubs/earlyburbs/projects/bosch/drvlites.htm
1995 Honda Passport; Some people wait a life time for their ship to sail in, while others simple grab the oars and begin paddling Yours truely http://www.zutah.com
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Re: Bear with me: relay wiring help needed
[Re: Locomigo]
#720572
05/04/06 12:27 AM
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Joined: Aug 2003
Posts: 165
Wheeler
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So, it is very possible to have two devices hooked up to this same relay, although not standard practice. Ive utilized that scenario a lot for alarms, etc... I used sort of a reversed setup on my fuel pump when I had to switch to an electric from a mechanical. One device hooked up to two different sources of power. The fuel pump positive wire is on 30, 87a is hooked up to the starter circuit (power to pump only when key is to start) and 87 is hooked to a keyed on cicuit (power only when key is ON). The coil (85 and 86) is hooked to a feed off the engine relay that has power only when the motor is spinning. It took me a while to work it all out, but now the pump only runs if the key is turned to start or the motor is running. No runaway gas leaks in an accident or if the motor dies when I leave it idling.
"Time and tide melts the snowman"
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