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Topic-icon Relay for heated grips

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1 month 5 days ago - 1 month 4 days ago #4452 by 16077
Relay for heated grips was created by 16077
I started this discussion, but can't find the original... Adding some factory grips to a 1981 R100 RS. Decided to take the advice of my fellow airheads and go from the switched power in the headlight bucket, to a relay, then to a fused switch.

Got the switch. Got the relay. Got the grips. Now how to make it work? I'm having trouble making the relay work.

1. Switched power #30 (that comes from a power source that is “switched" on ideally. Could also come straight from the battery but what if you forget and leave the grip on?)
2. Ground that first circuit #87

3. Then comes the circuit you want to run - #85. A fused line goes to a switch, and then to the application (switch also goes to ground - two prongs)
4. Lastly the fourth terminal #86… what? goes to ground or to the application as a ground. I think this is where I’m messing up. I have it lashed up to an old battery as a test but the relay won't click on.

I tried just battery, switch, to grips. Then grips to ground and it worked!. But I want to isolate the connector block from this circuit.

Thoughts? Thanks!
Last edit: 1 month 4 days ago by Wobbly.

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1 month 4 days ago - 1 month 4 days ago #4453 by Wobbly
Replied by Wobbly on topic Relay for heated grips
Original discussion Right Here

Attached is a simplified schematic...

Don't hide 'em, Ride 'em !!
#15150
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Last edit: 1 month 4 days ago by Wobbly.

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1 month 4 days ago #4454 by 16077
Replied by 16077 on topic Relay for heated grips
Thanks Wobbly. I've been drawing circuits and experimenting. I appreciate your effort.
It's a matter of reconciling the theory, or circuit diagram, to the physical components. I think I have it solved only to try it out and realize it aint workin'.


It's a long weekend! so here I go. Will try on the bike using your idea.
thanks
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1 month 4 days ago #4455 by Wobbly
Replied by Wobbly on topic Relay for heated grips
By obtaining your relay power using Green/Black, you protect the relay circuit with the 8A fuse already in your headlamp shell. Additionally, either the ignition key or the manual switch will turn the grips OFF.

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3 weeks 6 days ago #4493 by 16077
Replied by 16077 on topic Relay for heated grips
I actually, finally hooked it all up. Pulled power from the battery, went through the relay, to a switch, to the grips. Pretty disappoint result however. There does look like there's power and I can feel a little heat, but not as good as my '87 K75S. This is not running, just pulling power from the battery.

Question: I just used a simple single pole switch, not the high/low original. I assumed that would be equal to on or High. Should I go back to the original? I want full power (hot!).

thanks

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3 weeks 6 days ago #4495 by Wobbly
Replied by Wobbly on topic Relay for heated grips
The amount of heat you feel is based solely on the wattage of the heaters. So before I answer any more questions, why don't you tell us about the wattage.

Don't hide 'em, Ride 'em !!
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