From: James Shanks (n1vbn@bit-net.com)
Date: Tue Nov 19 2002 - 21:06:58 PST
Ron,
As inspection sticker shops go I would for the moment go by a bicycle
shop and buy a simple rubber bulb style horn, clamp to left mirror and wait
for the mechanic to say " please blow the horn". It would help if you had
the drivers window down before you drove in. It is legal for a motorcycle in
all 50 states. THEN you have some time to troubleshoot the factory setup.
Jim
n1vbn@bit-net.com
1998 IMZ 8.103
----- Original Message -----
From: "Ronzo" <rojoha@attbi.com>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Monday, November 18, 2002 6:09 PM
Subject: [MV] CUCV electric principles or ......
> If you let the smoke out of the wires, why does the electricity stop
> flowing?
>
>
> Dumb, dumb, dumb....
>
> CUCV Horn Horrors
> Symptoms: Push horn button, no noise.
>
> 1) observe no horn fuse in fuse block...AH HAH!!!
> Install fuse in horn spot in fuse block...push horn button
and....no
> horn (now you wouldn't want to ask why there was no fuse in the horn slot,
> now would you?)
>
> 2) Observe that with fuse in horn slot, and pushing on horn button,
> there is a 'click, click' sound. Investigation reveals this is the horn
> relay...remember location for further investigation.
>
> 3) Proceed to front of truck, observe horn is there (check). Notice
that
> there is a wire coming from horn...tug wire, get rewarded with a connector
> not connected to anything. Hmmmmm.... Remove headlight bezel, look for
> unattached connectors....no joy.
> Crawl under truck, with big flashlight, observe a wire with a
> matching but opposite connector to the one on the horn, carefully tucked
> behind a wire harness. Untuck it. It magically reaches the horn connector,
> but due to the grille and black out light and bridge plate, there is NO
way
> you can make the connection without disassembling the entire front end of
> the truck.....hmmmmm.
>
> 4) To waste some time and avoid dis assembling truck for a couple of
> minutes....get length of wire, strip both ends, stick one end in the horn
> connector and touch other end to positive terminal of bottom battery. Jump
> when horn sounds! DO NOT WONDER WHY SOMEONE WENT TO SO MUCH TROUBLE TO
> TOTALLY DISCONNECT A PERFECTLY FINE HORN......
>
> 5) Find 2 pairs of really LONG nose pliers and finagle the connectors
> together.
>
> 6) Go to cab, turn Ign Key....horn sounds like a wounded yak as soon
as
> key is turned....push horn button, horn gets louder! As added bonus glow
> plug "WAIT" light goes out each time you push horn button, comes back on
> when you release horn button. ???? Oh, what's this? Added bonus, smoke
> coming from under dash!!!
>
> 7) Key off, unplug horn connectors, dive under dash and unplug 'HORN
> RELAY' from harness. Horn relay does not feel hot???
>
> 8) Reconnect horn, turn key, horn resumes wounded yak imitation
without
> the relay in the socket. Horn does not respond to horn button anymore,
> neither does the 'WAIT' light, but then again a plus in that there is no
> more smoke.
>
> 9) Back to the manuals...Horn Relay connector has a
'RECTIFIER'(looks
> like a diode or large resistor) stuck in the back of the connector....for
> what purpose? Rectifier for M1010 is different from other CUCVs...why?
What
> does it do?
>
>
> Anyone else come across something like this? There is not a lot of
room
> to strip off the binding tape off the harness before it goes to the fuse
> box, ditto the horn relay harness. I haven't located the wiring diagrams
in
> the manuals yet, still looking. But a mite PO'd that some kind of screwy
> wiring blunder involving a 3 wire connector for the horn can cause smoking
> dash board and weird light show on dash lights. If the harness has melted
> and shorted, well mega bummer. Maybe reason why truck got
> surplussed....after all, rest of truck is cherry. And without coming up
with
> a working horn means no inspection sticker and no drivee truckee.
>
> Maybe horn wire from horn button in column is shorting?
>
> Anyone got some ideas on what's going on here?
>
> Please???
>
> Ronzo
>
>
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