5 INSTALL GROMMET AND MOUNTING CUP ON THE WIRING HARNESS AS SHOWN IN
DIAGRAM 1
.
GROMMET IS FOR THE HOLE IN THE FIREWALL
6 DO NOT CONNECT WIRING HARNESS TO THE GAUGE UNTIL THE OTHER CONNECTIONS HAVE
BEEN MADE AND TESTED.
7. LOCATE THE FUEL PRESSURE SENSOR.
8. DISCONNECT THE FACTORY FUEL SENSOR HARNESS CONNECTOR BY PUSHING IN THE LOCK-
ING CLIP AND PULLING THE CONNECTOR AWAY FROM THE SENSOR. CONNECT ONE END OF THE
SPEK-PRO SUPPLIED WIRING HARNESS PLUG TO THE FACTORY SENSOR AND THE OTHER END INTO
THE EXISTING FACTORY WIRING HARNESS. THIS INSURES THAT THE VEHICLE’S COMPUTER STILL
RECEIVES THE PROPER INFORMATION. MAKE CERTAIN THAT CONNECTOR LOCKING TABS ARE SET.
FAILURE TO DO SO WILL RESULT IN ROUGH IDLING OR INABILITY TO START ENGINE.
CAUTION: TAKE PRECAUTION TO PROTECT FUEL RAIL PRESSURE SENSOR WIRING. IMPROPER IN-
STALLATION CAN LEAD TO SHORT CIRCUIT THAT COULD CAUSE ENGINE DAMAGE
9 CONNECT THE
RED
(+12 VOLT SUPPLY) WIRE TO “ON” CIRCUIT THAT GETS POWER WHEN THE
IGNITION IS TURNED ON. THIS CIRCUIT MUST BE FUSED BEFORE THE IGNITION SWITCH
(3 AMP, FAST ACTING FUSE).
10 CONNECT THE BLACK WIRE TO A GOOD GROUNDING POINT ON THE CAR’S CHASSIS.
11 CONNECT THE
WHITE
WIRE TO THE DIMMER VOLTAGE GOING TO THE DASH LIGHTS.
12 PLUG THE WIRING HARNESS INTO THE GAUGE AND MOUNT IN POD OR DASH. USE CARE WHEN
CONNECTING OR DISCONNECTING THE WIRING HARNESS.
13 FOR DASH MOUNTING, ATTACH MOUNTING CUP OVER THE BACK OF THE GAUGE AND HAND
TIGHTEN. DO NOT OVER-TIGHTEN. MOUNT CUP BEFORE INSTALLING GROMMET. FAILURE TO DO
SO WILL TWIST WIRES CAUSING A SHORT CIRCUIT.
14 POWER UP THE GAUGE AND INSPECT ALL CONNECTIONS. IF GAUGE IS OPERATING NORMAL,
PROCEED TO “PROGRAMMING MANUAL.”
TROUBLESHOOTING
:
THE GAUGE FACEPLATE WILL FLASH ALTERNATELY “
RED
” THEN “
GREEN
” IF THE SENSOR PROBE
IS NOT CONNECTED TO THE WIRING HARNESS.
8
Wiring Installation Instructions for : Pressure
2
1/16
” Spek Pro Fuel Rail Pressure Gauge