Safari Van M V6-262 4.3L VIN W CPI (1992)
Speedometer Head: Description and Operation
With Electronic Cluster
The Electronic Cluster uses a vacuum fluorescent display for the speedometer, odometer and other functions. The speedometer and odometer displays
receive a signal from the Vehicle Speed Sensor Buffer (DRAC) through the LT BLU/BLK (824) wire at C226. The Vehicle Speed Sensor Buffer
(DRAC) converts the speed signal from the VSS to 4000 pulses per mile. A different Vehicle Speed Sensor Buffer (DRAC) is used for each axle ratio to
convert the signal.
Battery voltage to the cluster is supplied by the ORN (140) wire at C226. This circuit is used to supply voltage to the memory to maintain the total and
trip mileages for the odometers. Ignition voltage to the cluster is supplied by the PNK/WHT (350) wire at C226. This circuit supplies voltage to the
vacuum fluorescent displays and other functions.
The speedometer indicates vehicle speed in miles per hour or kilometers per hour depending on E/M switch position. Speeds below 1.4 mph may be
displayed as "0".
The odometer/trip odometer display is mounted on a separate board attached to the main display board. The odometer displays the total vehicle
mileage up to 999,999 miles in the English mode. If the mileage exceeds this, the display flashes ERROR. In the Metric mode, the display will flash
ERROR when it exceeds 999,999 kilometers. The English display will still show the normal display.
The display can be switched from total odometer to trip odometer by pushing the TRIP button. When the switch is open, the total mileage is displayed.
When the TRIP switch is closed, the trip mileage is displayed. This signal is sent to the cluster through the LT GRN (226) wire at C226. When the TRIP
switch is closed (trip mileage) the LT GRN (226) wire is connected to ground through the BLK (150) wire at the switch assembly.
The trip odometer can be reset to 0 by pushing the RESET button. This momentarily connects the LT GRN/BLK (376) wire at C226 to the BLK (150)
wire at the switch assembly. The display must be in the TRIP mode to be reset.
The accumulated mileages of the two displays are stored in a non-volatile memory chip to prevent losing this data if the battery or cluster is
disconnected.
If the cluster is replaced, the Odometer Display can be transferred to the new cluster.
The entire cluster is replaced as a unit. There are no dealer replaceable parts within the cluster. If there is a condition in the Digital Cluster, the whole
cluster is removed and exchanged.