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1988 KW w900 wiring diagram

Posted By Bruce Setter Friday, March 04, 2011 8:47 AM
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Bruce Setter
 Posted Friday, March 04, 2011 8:47 AM
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Does anyone have a cab wiring diagram for a 1988 w900b?  I am having trouble figuring out a problem with the headlights.  I have everything else but the headlights, marker, dash, tail lights,  but no tail lights.  I have tried switching relays around and that isn't it .  I am not familiar with the wiring on a KW as this is my first one so any help would be great  Thanks in advance,  Bruce
Swishy
 Posted Friday, March 04, 2011 12:25 PM
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BS
Gudday M8
not sure ifn this will help coz they B a lot older than the 1988 V:
loong B 4 pooterz






cya
§wishy


 

"Jist doing wot cums naturally" Sum may say "The early bird gets the worm!"

But we all know the 2nd mouse gets the cheese

Ifn U're truck comes with two sticks, U might as well just row a boat

 

Mark Brubaker
 Posted Friday, March 04, 2011 3:09 PM
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Bad dimmer switch ?     I suppose in an '88 model that would be a dimmer lever mechanism....

'74 IH 4370
Kid
 Posted Friday, March 04, 2011 5:13 PM
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Bruce, on the A models, probly same on Bs.. 1A circuit feeds the light switches, the 1B(s) go to tail and markers. 1A is #2 in the hot breakers.. see the pic

===========================================================================

1972 KW925 SC350 12513 240WB, restoral in progress, 1936 CAT RD4 w/LPC 4A blade restored ground up

 kw1 (2).jpg (105,246 views, 925.07 KB)
Friday, March 04, 2011 5:15 PM by Kid
Bruce Setter
 Posted Saturday, March 05, 2011 12:53 AM
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Thanks guys,  I was thrown of the trail because it was two things causing my problem, corrroded (sp) board on the firewall behind clutch and someone put the wrong headlight in.  It is working now.  Bruce
Kid
 Posted Saturday, March 05, 2011 3:12 AM
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That's ok Bruce. It's to be expected, after all its a B model (Bad), if you'd had an A (Awesome) model, you wouldn't have things like this... :P

===========================================================================

1972 KW925 SC350 12513 240WB, restoral in progress, 1936 CAT RD4 w/LPC 4A blade restored ground up

Bruce Setter
 Posted Saturday, March 05, 2011 7:00 AM
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Now you tell me,  I wish I would have asked you before I bought it a couple of weeks ago. 
Scott Waggoner
 Posted Saturday, March 05, 2011 5:43 PM
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Kinda a bad thing on the KW fuse/relay/breaker panel in those years. Get full of dirt or moisture and the light circuits are at the bottom of the panel. Way better wiring than a A-model though, that ought stir something up!

Scott Waggoner
MIKE WALLACE
 Posted Monday, March 07, 2011 5:14 AM
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As a former yacht electrician, I would have to say that the wiring in most things production made is scetchy and poor. I mean in the KW A model they factory crimped wires halfway in a run of wire instead of a home run to a buss or ground. It's all about dollars and cents.

It's a wonder my truck was never leveled by fire.

It is being wired very differently now. More work and expense for sure.

Mike


 Mack? I ain't no Mack! I'm a Peterbilt for dang sake! Turn on your lights, ya moron! ...
Scott Waggoner
 Posted Monday, March 07, 2011 2:17 PM
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Every wiring issue is usually at a connection, lousy bulkhead connectors and loose spade terminal ends are the death of most. I used to rewire most of our A-models high load circuits, headlamps, tail/marker, heater, b-up lights etc. Add relays to eliminate the "okay its now really dark" "click" of the headlamp breaker! We had alot less problems with the early A-models that had terminal strips on the firewall. Wiring from scratch? least amount of connectons and ground switched relays when possible.

This summer I'm helping a friend build a A-model extended hood from scratch. I'm doing the engine and the wiring. I have a complete power distribution box and harnesses out of a 2001 KW 900L. Engine will be a C-15 Cat. Will be using guages and everything else adaptable. Fun!!


Scott Waggoner

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