Wiring The Instrument Cluster; Speedometer & Tachometer Wiring - Ford F100 1953 Installation Manual

Wiring the Instrument Cluster

Speedometer & Tachometer Wiring
1) Always disconnect the vehicle battery before wiring any gauge.
2) Connect a +12VDC switched power source to the Pink wire of the
speedo / tach harness.
3) Connect a good chassis ground to the Black wire of the speedo / tach
harness.
4) Connect the speed signal to the purple wire of the speedo / tach
harness.
a. SN16 & SN16F pulse signal generator signal
i. Connect the white wire to the speedo / tach harness purple
wire.
ii. Connect the black wire to a good chassis ground
iii. Connect the red wire to speedo / tach harness red wire.
b. Transmission vehicle speed sensor signal (2-wire)
i. Connect one of the vehicle speed sensor wires to the
speedo / tach harness purple wire.
ii. Connect the remaining vehicle speed sensor wire to the
same ground as the speedo / tach harness black wire.
iii. The vehicle speed sensor wires are interchangeable, it
doesn't matter which one is connected to the black or purple
speedo / tach harness wires.
iv. Insulate any exposed wire on the red wire of the speedo /
tach harness. This wire is not used with this speed signal.
c. PCM / ECM speed signal (computers)
i. Connect the speed signal wire to the speedo / tach harness
purple wire.
ii. A signal filter (part number SN79) is sometimes needed in
cases where the signal has picked up interference.
iii. Insulate any exposed wire on the red wire of the speedo /
tach harness. This wire is not used with this speed signal.
5) Connect the tachometer signal to the white wire of the speedo / tach
harness. (see table 2: tachometer signal sources)
6) Connect one wire (either) of the pushbutton to the brown wire of the
speedo / tach harness.
a. Connect the other wire of the pushbutton to a good chassis ground.
7) The grey, blue / white, purple / white and green / white wires of the
speedo / tach harness are not used in this application.
Revised September 13, 2013