Allante V8-273 4.5L (1991)
5.
Take a 4 inch length of 18 AWG (.8 metric) wire and connect a terminal (that will insert into the console lamp connector) to one end.
6.
Solder the other end of the wire to the top of the terminal at the end of circuit 142.
7.
Re-insert circuit 142 into cavity B of the trunk lid release switch connector.
8.
Insert the terminal at the other end of the jumper wire into cavity B of the center console lamp connector.
9.
Reconnect the negative battery cable.
DRAIN ON CIRCUIT BREAKER 24
Circuit breaker 24 supplies power to the soft top pulldown motor. It is possible for a misadjusted soft top or soft top pulldown motor to allow the
pulldown motor to operate continuously. This may not be seen or heard during an inspection of the vehicle.
If the excessive drain on the battery is eliminated when circuit breaker 24 is removed, the soft top and/or soft top pulldown unit may be misadjusted,
causing the motor to continuously operate. The motor will feel warm upon inspection.
Refer to Serviceman Bulletin T-88-64, Group 10 for soft top and soft top pulldown motor adjustment procedures.
DRAIN ON FUSE 8
Fuse 8 supplies power to the central power supply (CPS). The CPS, in turn, supplies power to the body computer module (BCM). A BCM remaining
powered can cause a 700-950 mA drain on the battery.
The BCM may remain "awake" if it is receiving some type of "wake-up". Page 8A-50-4 of the Allante Service Information Manual provides a schematic
of all of the possible BCM wake-ups. Most wake-ups are switches that toggle a BCM voltage to ground. Thus, the BCM could interpret a shorted wire or
stuck switch as a legitimate wake-up and remain awake.
To determine if the BCM is receiving an erroneous wake-up, while the drain is present, enter BCM diagnostics and exercise all of the BCM inputs; BI03
(LH door jamb switch), BI04 (RH door jamb switch), BI30 (time/temp display switch), BI60 (theft alarm), BI61 (door unlock switch), BI92 (headlights).
When an input does not alternate between Hi and Lo, there may be a problem with the associated switch or wiring that could cause the BCM to wake-up.
BI61, the door unlock switch, should be checked first. If this switch remains grounded, or, if there is a short to ground on circuit 262, not only will there
be a battery drain, but arming the theft deterrent will be impossible and the central door unlocking feature will not be fully operational.
If diagnosis identifies the door unlock switch circuit as remaining grounded, both the left-hand and right-hand switch circuits will have to be inspected.
Inspection should include checking for chaffed or damaged wiring in the door panel as well as a damaged or sticking switch. Also be sure that the wires
in the switch connector are in the correct cavities; circuit 262, a green and white wire, should be in cavity B and circuit 1503, a black wire, should be in
cavity A.
