Step 5. RPM Cable Installation
This connection will depend on the brand and year of boat you own.
(1) Standard Installation (Older boats and boats with traditional Analogue gauges with
Posts on back)
The Gray wire with ring terminal can be easily attached to the “SEND” post on back of
tachometer. This Gray wires picks up the raw engine rpm from this post. The Black
wire ring terminal can be attached to any suitable ground, including the ground post
on the tachometer. (If there is not a post, connect to the solid gray wire coming from
the tachometer).
(2) 2002 - 2005 MasterCraft – The custom wiring harness supplied by PerfectPass allows
for plug & play for RPM and Power.
(3) 1998- 2004 Malibu (Borg Warner Gauge System)
In behind the dash pod on most models, Malibu has left a Gray (RPM) wire that
terminates at a large female spade connector. If you can locate this, you can simply
attach the Gray wire on the rpm sensor cable to this connector.
Alternatively, you can locate the solid gray wire in the main wiring harness that leads
into the Borg Warner control box under the dash. Use a blue “Tee Tap” connector to
connect to this gray wire. You can then attach the gray rpm sensor wire to this using a
push on spade connector. The black wire can be securely connected to any suitable
ground.
LS-1 On this engine (pre 2002 only), you only connect the Black wire on the RPM
Sensor cable to the Gray wire leading to the Borg Warner control box. (Same as LT-R
MasterCraft). The gray RPM sensor wire is left un-connected.
2005 Malibu - See Plug & Play Harness.
(4) 1999 – 2001 MasterCraft, 2000 Supra, 2000-2002 Infinity (All Other Brands Using
Borg Warner Gauges)
TBI & Multi Port Engines (except LT-R) – Locate the solid gray wire in the main wiring
harness that leads from the engine into the Borg Warner control box under the dash.
This solid gray wire carries the raw engine rpm. Use a blue “Tee Tap” connector to
connect to this gray wire. You can then attach the gray wire on the rpm sensor to this
using a push on spade connector. The black wire can be securely connected to any
suitable ground.
LT-R / LT-1 - On this engine the Gray wire lead on the PerfectPass RPM Sensor cable is
not used and can be taped off. The separate Black wire end must be connected to the
Gray wire located in the main wiring harness leading into the Borg Warner MDC
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