GM has a service bulletin posted somewhere on theier web page (I'll look for
it later) that IIRC recommends direct connection at battery (right front of
vehicle) of both pos and neg leads, both (IIRC) fused at the battery, using
a NAPA or other side terminal extender bolt, and, IIRC, crossing to left
side at front by radiator then rearward thru firewall. I believe the OBC is
right side near firewall, and it should be well shielded to meet non
optional part 15 requirements. Another practice I have seen recommended
elsewhere is to twist the pair of wires as they run from battery to
x-mitter, in order to reduce pickup or radiation (same concept as twisted
pairs for CAT 3 & CAT 5, mic cables, TV twinlead, ladderline, etc.)

Ferrite beads could also be applied th the power leads to attenuate any RF
that did make it out (or in), too, and may be needed elsewhere if something
else proves noisy.

Ford states in a similar (though slightly less detailed) bulliten that their
vehicles are designed for transmitters 100 watts output and recomments
antenna (with good quality 95% min shield coax) on roof or center of trunk
lid, but not on/near hood or front fenders, and not thru glass type for
windows w/ built in AM/FM antennas, and not near defroster lines.

GM seems to be good about screwed (vs clipped) ground braid on their hoods.

Transmitters are a fact of life in small and large light trucks (utility,
DPW, public safety, commercial, etc. service in addition to amateur, and
full size sedans (police as well as others above).

Did hear a funny story a few years ago of a radio install that gave nothing
but trouble when transmitter was keyed, seems they had wrapped excess
antenna coax around an available box under the dash, turned out it was
related to the computer control system, coax trimmed and relocated and end
of problem.




"KC3AK" wrote in message ...
Does anyone have experience putting a 2 meter rig in a Chevy S10? I
have a 2002 S10 and want to put my 2M rig in it, but the service
department either can not or will not tell me if it will interfere with
the onboard computer. The only thing they would say is to connect it
directly to the battery. Like I wouldn't do that anyway! Any
experience, either positive OR negative, would be a help.
Thanks,
Terry