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Re: Resistive Cable

To: "Wil Clark" <>, <>
Subject: Re: Resistive Cable
From: "Paul Hunt" <>
Date: Thu, 19 May 2005 10:54:54 +0100
There is a length of pink (from what I have seen) resistive wire hidden in
the loom as Kelvin describes with a white (up to 76) or white/brown (77 on)
tail at the fusebox end and a white/light-green tail at the coil end, which
extends down onto the boost terminal of the solenoid.  This wire should
measure about 1.5 ohms, much the same as the primary of the recommended
coil, to drop the 12v of the cars electrics down to 6v for the coil.  This
is boosted to 12v during cranking and the system makes for easier starting.
If the wire has overheated over a small area it implies that the conductors
are damaged at that point causing a localised hot-spot.  If it is damaged
over a longer length it implies that it is carrying too much current, either
because of a partial short (a full short would prevent it running) at or
near the coil end or an incorrect coil of much lower resistance than it
should be.  With the ignition on disconnect the white/light-greens from the
coil and measure the voltage on the wires.  You should see the full 12v, any
less shows there is a partial short on the wiring, which could be grounding
or incorrectly connected at the solenoid.  With the white/light-green
reconnected to the coil (+ve), and the points closed, or a ground connected
to the other coil terminal (remove the existing wiring from this terminal
first) you should see about 6v on the white/light-green.  If the resistive
wire is damaged you can replace it with an externally mounted ballast
resistor of about 1.5 ohms connected between the white or white/brown at the
fusebox and the coil +ve.  You will also need disconnect the pink resistive
wire, ideally at both ends, but definitely at one end.  If the coil primary
does not measure close to 1.5 ohms you must replace it with one that does.
Measure it before paying for it, not all suppliers know the difference
between 12v coils and 6v.


----- Original Message ----- 
> ... one wire was really hot at some
> point. Hot enough to not only melt its own insulation, but also split/melt
> blue over wrap in several places.
> The wire in question is Pink/White.

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