I know I sound dumb in asking this but is there some kind of blinking running light code/language? Ive noticed when pulling trailors on the interstates that the big trucks do this to let each other know when its safe to change lanes by blinking twice and the other truck usually blinks 3 times as if he's saying thanks afterwards. Ive even had them do it to me so today I rigged up a normally closed momentary push-button switch in conjunction with a relay (to handle the voltage) on my running lights only. Just thought this was a really cool way of communicating.

 

Yeah, that is what the big trucks do. Also, a high beam flash signals another truck that is it ok to merge into your lane in front of you.

 

Thanks, this is something I've always seen just never asked about.

 

They do it all the time to us while pulling a trailor. It just makes it easier for the truck drivers, because sometimes it can be hard to judge distances in the mirrors.

 

I was tought what it meant as a kid... And thought everyone else was too. Carefull who you do it to. I have made some people pretty mad by doing it to let them over...

 

I would say in general truck drivers don't use their brights at night... most will either flash their running/cab clearance lights or momentarily turn off their headlamps.

 

can you tell me how you did it if you got pics that would be great

 

Yes its easy, used a regular old 30 amp relay. I first had to find the running light wire by using a test light on the headlamp switch plug, this only narrowed it to 2 wires. My 2000 uses a black wire with a yellow stripe, you have to be carefull not to use the interrior illumination wire, it comes on the same with the running lights. To narrow it down I pulled the 2 wires/pins out of the headlamp switch harness until I found witch one was witch, then I cut the running light wire and ran the side coming from the switch to relay terminal #87 I also spliced a lighter guage wire onto it and ran it to a NORMALLY CLOSED momentary mini push button, I got a pack of 4 of these @ Radio Shack for $3.49. The pushbutton can only handle .05 amps so you have to use a relay. Next I ran the other side of the pushbutton to relay terminal #85. Use the other (harness side) of the running light wire on relay terminal #30. Lastly I used a T tap connector to run my ground wire from a known ground source on the headlamp switch wire harness to relay terminal #86 and your done. If you still need pics just lemme know & I'll try to get some up tomorrow.

Just a side note, I have a 2000 without factory foglamps so I drilled a hole in the face of the headlamp switch with a 1/4" drill bit where the fog lamp indicator light would go. Its easy to find this spot just split the switch assembly apart and hold the front half up to the light, you will see the little fog lamp icon through the translucent part of the switch face. This method requires spliting the headlamp switch apart and running the wires through where the foglamp indicator bulb would screw in to the back half of the headlamp switch assembly. If your truck is a 94-02 and you dont want to mount the pushbutton there you'll have to find another spot on the dash.

Hope this helps

Hummer

 

From www.dodgeram.org

http://www.dodgeram.org/tech/mods/el...tail_blink.htm

I did mine to interrupt the power when the parking lights lights are on only.
It has the side benefit of taking the running light circuit load off of the headlight switch as all power for them now comes from the battery through a relay.

There's a second way with a three position switch and multiple relays to blink them off if they're on, and on if they're off.
That's just overkill to me.

 

That's the way mine works too and the interrior lights stay on, the only thing that blinks is the running lights. The only difference is the way I did mine still uses the power from the switch but you could easily replace the wire to terminal 87 with a constant 12v lead straight off the fuse block or one of the batteries and have it work exactly the same as yours. I didnt think about doing it this way, but you could very well do this. I just wanted to keep all my wiring short and in one place, not one wire is over 4" long.

 

Having a Dually with 18 running lights, I opted for the power from the battery (though my accessory fuse block) due to the added load of trailer lights.
The only load on my switch's parking light circuit is for energizing the relay.

 

I thought the factory switch worked a relay that powered the lights, surely they dont pipe all the power through the 16 guage wire coming off the headlamp switch. My dually's switch has powered 15 factory running lights and a bunch more on a goose neck for 120k just fine though. All my switch does is interupt the 12v signal coming from the headlamp switch via a 30 amp relay. I only used a relay because the push button is rated for .05 amps max

 

EXACTLY!

High beams during the day = OK to come over - Don't do this at night
headlights (low beam) off-on-off-on at night (or during the day) = OK to come over.

flashing running lights after coming over = thanks

 

Quit that!!

I don't know who started that, but it's not true. The "real" truck drivers don't flash our high beams, just the steering wheel holders.

 

Speaking of real truck drivers.. that is a heck of a wiggle wagon in your gallery pics!