ISSPRO R18599 - Manual (Page 2)

Form No. IS168 (Rev. D 8/27/09)
ISSPRO, INC.
 2515 N.E. Riverside Way  Post Office Box 11177  Portland, Oregon 97211-1899
503-288-4488  800-888-8065  Fax: 503-249-2999
www.isspro.com © 2008 ISSPRO, Inc. All Rights Reserved.
6 Route the sensor harness to the intended gauge mounting location, using grommets as appropriate
when passing through the firewall. Connect the sensor harness to the gauge connector as follows:
7   Trim wires to desired length. The green and black wires are the sensor and ground connection,
and connect to cavities 5 and 6 of the orange connector respectively (see Figure 3).
 Install the two wires into the insulation displacement connector (orange connector). Carefully lay
the wires across the connector cavities, hold the connector steady with a vice or pliers and press the
wires into each cavity with a small screwdriver. Each wire must be pushed completely to the bottom of
its groove in the connector, to ensure a good electrical connection.
8   An optional wiring harness is available (ISSPRO P/N R72022) to
simplify wiring and provide a potentiometer for reducing the brightness of the
gauge lights while still following the vehicle dimmer level. If this dimming
function is not required, you can substitute your own 18 gauge wires in place
of the harness, using a single wire in place of the orange and orange/black
wires. Connect one end of each of these wires as follows:
 Ground – The black wire should connect to a clean ground on the
vehicle such as the battery negative terminal or a factory ground bolt.
 Ignition – The red wire should be connected to a circuit that switches
on with the key switch.
 Wire should be fused so as not to exceed 3 amps. If the circuit does
not have a fuse, or the existing fuse is higher than 3 amps, use an inline
fuse.
Figure 3: Connector.
1 Red Ignition
2 Orange Dimmer
3 Black Ground
4 Empty
5 Green Sensor
6 Black Ground
 Dimmer – Connect the orange/black wire to the factory gauge dimmer circuit by either tapping
into the in-cab fuse block or by connecting directly to the wire running from the dimmer on the
headlight switch.
Connect the red, orange and black wires to the orange connector as described above, in positions 1, 2,
and 3 respectively. Slide the white dust cover over the orange connector once the wires are securely
installed. NOTE: The gauge backlighting will only illuminate if both the ignition supply AND the
backlighting circuits are on.
 The lighting harness is designed to be used with Performax EV²™ gauges. DO NOT
attempt to use this harness and potentiometer with any other gauge types.
OPTIONAL: Daisy Chain Your Gauges – If multiple Performax EV
2 ™ gauges are being installed in
one location (such as a pod), you may use a single set of the Ignition, Ground, and Dimmer wires to
connect all of the gauges. Simply pass the wires from one orange connector to the next one in a “daisy
chain” configuration.
9  Install the connector onto the back of the gauge (angled portion on end of connector pointing up as
in Figure 3), and then secure the gauge in its mounting location. If drilling a mounting hole in a panel to
mount this gauge, the hole size should be 2.040”. Mounting Kit R19999 is available for larger mounting
holes up to 2.200”.
10  Secure all wiring so that it does not interfere with moving parts or chafe on sharp edges. This may
be accomplished by routing the wiring within the factory wire harness sheath, using wire ties and
sheathing, and using appropriate grommets when passing through the firewall.