need relay, diesel coolant heater
Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=108334
Printed Date: May 31, 2024 at 7:42 PM
Topic: need relay, diesel coolant heater
Posted By: vetteluvr33
Subject: need relay, diesel coolant heater
Date Posted: October 22, 2008 at 4:15 PM
hi there, i need to find out what kind of relay i need, and how to wire it. i have a diesel coolant heater, and want to bea able to turn it on with my remote starter trunk output. i would like to be able to hit the trunk release (which is a neg output) and have it power up the heater which requires 12 volts constant to run. then i would like to either turn it off again by hitting the trunk release once more. now do i need 2 relays or 1?? and how do i wire that up?? thanks in advance
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Kurt (Bubba)
Certified Automotive Technician
Replies:
Posted By: ckeeler
Date Posted: October 22, 2008 at 4:22 PM
connect as follows: 85=12v constant 86=truck release wire from alarm/rs unit 30=12v constant 87=to heater unit 87a=not used
Posted By: vetteluvr33
Date Posted: October 22, 2008 at 5:09 PM
won't that standard bosch type relay shut off once the signal is sent? i need the relay to stay on until i hit the trunk release again. correct me if i am wrong please. i want the trunk release to energize the relay and have the relay stay on until i tell it to shut off.
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Kurt (Bubba)
Certified Automotive Technician
Posted By: ckeeler
Date Posted: October 22, 2008 at 5:22 PM
What alarm are you using? there is a programable output correct?
Posted By: vetteluvr33
Date Posted: October 23, 2008 at 8:04 AM
i have an arctic start 2 way alarm/rs. it is in my truck, and i don't use the trunk release which is a neg(-) output. i have a diesel powered coolant heater for the truck, but it only has an on/off switch. once the switch is on, it puts 12v to the heater. i would like to use the trunk release to turn the heater on, then if i need to, use the trunk release again to switch it off.
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Kurt (Bubba)
Certified Automotive Technician
Posted By: ckeeler
Date Posted: October 23, 2008 at 9:05 AM
Can your trunk relese output be programmed to be latching? on a side note, where did you get a 12v heater? i've been looking for one. how much power does something like that consume? all i ever see are 120v heaters
Posted By: vetteluvr33
Date Posted: October 23, 2008 at 10:25 AM
it is called a webasto, do some searching, it is expensive, but worth every penny. it circulates coolant, and uses diesel for heating. i have put an aux battery in the truck so it won't draw my starting batteries. it doesn't consume too much power. i can leave it on all night without killing a car battery. i think if i set some relays up like this, it will work  ------------- Kurt (Bubba)
Certified Automotive Technician
Posted By: ckeeler
Date Posted: October 23, 2008 at 10:42 AM
cool, i need one of those heaters. thanks.
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