Help - Whelen 2150 Wig-wag install issues

[TexasFireMedic]

Going on a 2006 C4500. Whelen had no clue on compatibility. Chevrolet could only tell me they didn't go to computerized headlights on medium duty trucks until 2007, so this should be standard switching.


Made connections right behind each housing, used passenger side near jblock. Dropped vehicle wire on drivers side (yellow side of flasher.) Blue side of flasher is connected to green high beam lead vehicle side and that side high beam lamp per diagram on flasher.


All normal headlight functions work normally like this with no main power to flasher. Can activate relays with no ill effects noted. Upon applying power, these occur:


1) all headlights off - wigwag functions normally, but does whine-whine instead of click-click. HBs work as expected, but this noise is not normal.


2) flasher cuts out as expected upon turning on the HBs, except it also cuts out for the low beams.


3) disconnecting either lamp causes the other side to flash, with normal relay click, except it flashes BOTH high and low beam on the connected side. Seems like voltage is getting across something.


Stumped. :Banghead: :Banghead:

 

[TritonBoulder47]

Did you connect ALL the wires for the flasher...? That being a dual purpose flasher (as in can be used for ground or positive switched headlights) its a finicky beast... Every time I've hooked one up the "standard" way with just the blue and yellow wires, it never worked properly... You have to hook up ALL the wires as per the wiring instructions...


http://www.whelen.com/install/135/13510.pdf

 

[twodogs603]

Just to confirm you are using a UHF-2150A flasher? And you have positive switched headlights?


If so, it should be wired as follows:


Cut the wire supplying 12v to each high beam several inches from the lamp connector.


Blue wire --to the drivers side high beam


White/blue wire-- to the wire coming from the headlight switch feeding 12v to drivers side high beam


Yellow wire-- to passenger side high beam


White/yellow wire-- to the wire coming from the headlight switch feeding 12v to the passenger side high beam


Orange wire--to your 12v switch


Red wire--to 12v (preferably fused at the battery)


Black wire-- ground


White wire-- Connect with white/blue wire above


White/Black wire--connect to the orange wire above


Brown--to parking light wire if night time cutout is needed.

 

[TexasFireMedic]

No, just a plain 2150. I think this is the one where your supposed to make the cut between the bulbs, unfortunately this vehicles doesn't seem to work this way.


Currently:


Red - power, fused at 15 amps coming off jblock post.


Black - grounded.


Orange - switch


Brown night cutoff - taped, not needed


Yellow - to drivers side high beam, side of cut leading back to vehicle taped


Blue - connected to green high beam wire from vehicle and passenger side high beam


Nothing soldered until we get it right.

 

[TexasFireMedic]

This is it.


http://www.whelen.com/install/132/13289.pdf

 

[ERM]

No, just a plain 2150. I think this is the one where your supposed to make the cut between the bulbs, unfortunately this vehicles doesn't seem to work this way.

Currently:


Red - power, fused at 15 amps coming off jblock post.


Black - grounded.


Orange - switch


Brown night cutoff - taped, not needed


Yellow - to drivers side high beam, side of cut leading back to vehicle taped


Blue - connected to green high beam wire from vehicle and passenger side high beam


Nothing soldered until we get it right.

Where is the supply wire coming from that supplies your headlights? Does it go to your driver's side headlight and then to the passenger's side or vice versa?

 

[TritonBoulder47]

According to the instructions you provided, and the description of what you did, you have your Yellow and Blue wires reversed... Blue is Drivers side, Yellow is Passengers side...

 

[ERM]

According to the instructions you provided, and the description of what you did, you have your Yellow and Blue wires reversed... Blue is Drivers side, Yellow is Passengers side...

Actually, it all depends where the supply is coming from. The layout is for when the supply is on the driver's side. He said the jblock is on the passenger's side, so we need to see if the supply is on the passenger's side.


Blue is the trigger to activate the yellow wire when the high beams are turned on. If they're wired backwards, it will never see the trigger.

 

[TexasFireMedic]

Found this and am reading through it.


http://www.gmupfitter.com/files/media/photo/205/2006_MD_Electrical.pdf


Edit - found on page 289.


If I'm seeing this correctly, green is in fact the high beam wire, but doesn't feed one lamp then the other, rather each side has its own feed and ground, but only at first glance. Their is only one electrical path feeding both lights. Rather than a single wire coming up behind the drivers side headlight, feeding that highbeam, then going across to the other side like I've worked with before, they split the feed for the two lights off further up the line.


I think the fact they have the "tee" furher up the line than at the first headlight fed, then the other, is what got me, leading me to think each light was fed independently.


Idea: reconnect drivers side as schematic indicates. Passenger side - blue wire to vehicle side, yellow to passenger side high beam.


Figure this should work?

 

[ERM]

Found this and am reading through it.

http://www.gmupfitter.com/files/media/photo/205/2006_MD_Electrical.pdf


Edit - found on page 289.


If I'm seeing this correctly, green is in fact the high beam wire, but doesn't feed one lamp then the other, rather each side has its own feed and ground, but only at first glance. Their is only one electrical path feeding both lights. Rather than a single wire coming up behind the drivers side headlight, feeding that highbeam, then going across to the other side like I've worked with before, they split the feed for the two lights off further up the line.


I think the fact they have the "tee" furher up the line than at the first headlight fed, then the other, is what got me, leading me to think each light was fed independently.


Idea: reconnect drivers side as schematic indicates. Passenger side - blue wire to vehicle side, yellow to passenger side high beam.


Figure this should work?

Reconnect the driver's side wire and tap the blue wire to it. Sever the passenger's side and connect the yellow wire to the wire closest to the headlight. Connect all the other power and ground wires to the flasher and you're done.