You don't need a new PCM? Your engine control module (ECM) already
receives a tach signal which it uses for it's engine control calculations.
The wiring harness from the gauge cluster to the firewall already has the
signal wire to operate the tach. All you have to do is add a single wire
from the ECM, mounted under the hood on your right fender, to the bulkhead
connector on your firewall, next to the brake booster and install the gauge
cluster, obviously. I will fax you a copy of the wiring schematic tomorrow
when I find the manual.
David
> [Original Message]
> From: Dan Burrows <vantage@adams.net>
> To: <dakota-truck@buffnet.net>
> Date: 6/21/01 6:49:41 PM
> Subject: Re: DML: Re: cluster
>
> what exactly is the PCM?
>
> Kevin wrote:
>
> > I would imagine that you ma need a new PCM also.
> > ----- Original Message -----
> > From: "Dan Burrows" <vantage@adams.net>
> > To: <dakota-truck@buffnet.net>
> > Sent: Thursday, June 21, 2001 6:40 PM
> > Subject: DML: cluster
> >
> > > I have a 91 Dakota and I am going to change the gauge cluster
from the
> > old
> > > style (huge gas gauge) to the one with the tach. Can I just plug it
in or
> > do I
> > > have to add some extra wires . Does the one with the big gad gauge
and the
> > on
> > > with the tach use the same sending unit or what?
> > >
> > >
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