GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.

Home » Public Forums » GMCnet » Power for Running Lights
Power for Running Lights [message #216029] Sun, 28 July 2013 19:48 Go to next message
SThornbg is currently offline  SThornbg   United States
Messages: 127
Registered: September 2011
Karma: 0
Senior Member
Is there a good power point on the outside of the firewall for connecting daytime running lights? If possible, power should be controlled by the ignition switch. DRLs will be LED.

I don't want to have to poke a hole for access to the glove box fuse panel.

Steve Thornburg
South Bend, IN
'77 exPB 455 "Tinker Toy"


Steve Thornburg South Bend, IN 77 exPB 455 "Tinker Toy"
Re: Power for Running Lights [message #216039 is a reply to message #216029] Sun, 28 July 2013 21:38 Go to previous messageGo to next message
Adrien G. is currently offline  Adrien G.   United States
Messages: 474
Registered: May 2008
Location: Burns Flat, OK 73624
Karma: 1
Senior Member
Steve,

How about the center (alternator) post of the splitter. The lights will be on as long as the engine is on, be sure to put an appropriate size fuse in the line.

Just a thought.


Adrien & Jenny Genesoto 75 Glenbrook (26-3) Mods LS3.70 FD / Reaction Sys / 80mm Front&Intermidiate / Hydroboost / 16" Tires / Frame Rebuild / Interior Rebuild Yuba City,Ca. Text 530-nine-3-three-3-nine-nine-6
Re: Power for Running Lights [message #216072 is a reply to message #216039] Mon, 29 July 2013 06:57 Go to previous messageGo to next message
SThornbg is currently offline  SThornbg   United States
Messages: 127
Registered: September 2011
Karma: 0
Senior Member
Thanks, Adrien

I don't know why that didn't pop into my head - engine on / lights on engine off / lights off.

I guess this is an appropriate use of "Duh"

Steve


Steve Thornburg South Bend, IN 77 exPB 455 "Tinker Toy"
Re: Power for Running Lights [message #216077 is a reply to message #216072] Mon, 29 July 2013 07:59 Go to previous messageGo to next message
tphipps is currently offline  tphipps   United States
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
Senior Member
Steve, Very easy access thru the firewall in the upper passenger side of the firewall, by the underhood light. Access the passenger compartment side by removing the glove box and reach inside the right side. Putting a piece of small diameter dowelling or wire into the grommet will help find the interior end.
I'm using this to pass my heavy 12v wiring for my Ham Padio.
You could use the yellow wire on the heater block to trip a relay to turn the lights on and off with the operation of the engine.
Tom, MS II


2012 Phoenix Cruiser model 2552 KA4CSG
Re: Power for Running Lights [message #216081 is a reply to message #216029] Mon, 29 July 2013 08:38 Go to previous message
RF_Burns is currently offline  RF_Burns   Canada
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
Senior Member
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.
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
Previous Topic: Rally in South East Michigan
Next Topic: Trip Report Too
Goto Forum:
  


Current Time: Wed Oct 09 14:28:24 CDT 2024

Total time taken to generate the page: 0.00565 seconds