| Re: [GMCnet] Power for Running Lights [message #216549] |
Thu, 01 August 2013 16:47  |
rallymaster
Messages: 662
Registered: February 2004
Location: North Plains, ORYGUN
Karma: -4
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Bruce, is there an easy way to add the tail lights to that setup?
I vaguely remember a car that had headlights and tail lights anytime the
engine was running, but don't know how they did it.
May have been a couple of diodes in the light ckts.
Thanks,
Ronc
On Mon, 29 Jul 2013 08:38:28 -0500 Bruce Hislop <bruce@perthcomm.com>
writes:
>
>
> Steve,
> I'm not sure how you are wiring your lights to make Day-time Running
> lights, but its very simple using a horn relay.
>
> Connect one side of the relay coil to the center of the isolator to
> get the "engine running" power. Connect the other side of the relay
> coil to the high-beam light power wire. This way with the engine
> running and the headlights set to OFF, the relay coil will get its
> ground through the low resistance of the high-beam headlight
> filament. When you turn the headlights ON and switch the high-beams
> ON, the relay coil will de-energise and switch off power to the low
> beams. You don't want both high and low beam filaments on at the
> same time.
>
> Connect the common relay terminal through a fuse to battery power
> and the Normally Open to the low-beam light. You could get power
> for the Low-beams from the isolator center terminal and get a higher
> voltage than battery, but for Day-time running lights you don't want
> them brighter than normal.
>
> --
> Bruce Hislop
> ON Canada
> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
> Hubler 1 ton front end
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> My Staff says I never listen to them, or something like that
> _______________________________________________
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Ron & Linda Clark
1978 Eleganza II
North Plains, ORYGUN
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Ron & Linda Clark
North Plains, ORYGUN
78 Eleganza II
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| Re: [GMCnet] Power for Running Lights [message #216554 is a reply to message #216549] |
Thu, 01 August 2013 17:50  |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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You could wire the relay to engage both the low beams on the headlight and the taillights when the engine is running. But, I think the OEM taillights are pretty weak in daylight and may not help much. I replaced my taillights with LED replacements ( not just bulbs), and they are brighter. Stop lights are now much more visible.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] Power for Running Lights [message #216832 is a reply to message #216584] |
Sat, 03 August 2013 20:10 |
SThornbg
Messages: 127
Registered: September 2011
Karma: 0
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Senior Member |
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Our set-up includes a 2-post combiner in place of the isolator so we don't have the alternator feed line seperate from battery input. Both posts are hot even with the key turned off.
The DRLs are LEDs built into the headlight units - similar to the Angle Eyes headlights.
I see easy access to the heater blower motor power wire that would give me "engine on" power for the LEDs. BTW what is the little tin can in that power wire - looks like an ignition capacitor with contacts on the ends?
Steve Thornburg
South Bend, IN
77 exPB 455 "Tinker Toy"
Steve Thornburg
South Bend, IN
77 exPB 455 "Tinker Toy"
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