| screws from rear of cluster |
 |
| Squeeze and pull out coding plug |
|
| Lift instrument carrier off housing. |
|
CAUTION: Take extreme care not to damage face of
instruments while removing. Place carrier face up in a safe location.
|
| Remove single silver Phillips screw from retainer in center of
housing. |
| Gently and evenly slide circuit board out of housing. |
CAUTION: Circuit board is a tight fit, it must be removed evenly or it will stick. Do not
use force or pliers to remove.
|
| Circuit board consists of two pieces. The service light board,
a small section attached vertically to the main board, containing the service indicator
LED's. And the "battery board" which is the main board and controls the
activation of most instruments and the service indicator lights. |
| If your service indicator lights are the only problem, you can
remove the small light board and discard it. However, if you have instrument malfunction,
the battery board must be replaced to preserve the integrity of the instruments. |
| The battery board is so called because it contains 2 small
batteries used to maintain memory of the service indicator lights when the main battery is
disconnected. |
| From 6/89 production, the boards were redesigned to use
Lithium rather than NiCad batteries, and also the circuitry was changed so that the
Lithium batteries were drawn on only when the main battery was disconnected. Prior to
this, the NiCad batteries supplied power to the service indicator board at all times , and
were recharged during vehicle operation. |
| Replacement of these batteries will often suffice to repair
associated problems, however, a thorough check of the battery board is required to ensure
there are no cracked solder joints. Re-flowing any suspect joints should also be
done at the same time as replacing the batteries. |
