Pontiac FIREBIRD 1972 Service Manual page 1293

CHASSIS ELECTRICAL 12-23
1. Test lamp connection "A" in Fig. 12-24 checks for
NOTE: All circuits in the bulkhead, engine and
continuity from the harness connectors through the
front end connectors can be checked in a simi-
front marker lamps to ground.
lar manner. Check wiring diagrams at end of
section for specific circuit locations in the vari-
2. Test lamp connection "B" in Fig. 12-24 checks for
ous connectors.
continuity from the bulkhead connector through the
fuse, headlamp switch and rear marker lamps to
ground.
GENERAL DESCRIPTION
NON-SEALED BATTERY
The Non-Sealed Battery is standard on most models (See
Fig. 12-113 at end of Section 12 for battery usage).
It has unique thru the partition cell connection structure.
Increased voltage due to this construction adds as much
as 10% to cold cranking speeds, extends time before run-
down under continuous cranking by 16%, and gives
longer battery life. In addition this construction allows a
weight reduction of approximately one pound.
The special electrolyte leve1,indicator permits a direct
visual check of battery fluid level without removing the
caps. A transparent eye in the cap of the second cell from
the positive post turns light when the fluid level is low
(Fig. 12-25).
WARNING: Hydrogen gas is produced by the bat-
tery. A flame or spark near the battery may cause
the gas to ignite.
Battery fluid is highly acidic. Avoid spilling on clothing
or other fabric. This battery has a specific gravity of 1.-
250-1.280 at full charge at 80°F.
R A T E .
STRAP
SEPARATOR
JG
SEALED
TERMINAL
Fig. 12-25 Non-Sealed Battery
The battery date code is located between the first and
second vent cap from the negative post. This date code
should always be included on product information reports
or battery correspondence.
J U M P S T A R T I N G W I T H A U X I L I A R Y
(BOOSTER) B A T T E R Y
WARNING: Never expose battery to open flame
or electric spark
-
battery action generates hydro-
gen gas, which is flammable and explosive. Don't
allow battery fluid to contact skin, eyes, fabrics
or painted surfaces
-
fluid is a sulfuric acid solu-
tion which could cause serious personal injury or
property damage. Wear eye protection when
working with battery.
Both booster and discharged batteries should be treated
carefully when using jumper cables. Follow exactly the
procedure outlined below, being careful not to cause
sparks:
Set parking brake and place transmission in
"PARK". Turn off lights, heater and other electrical
loads.
Remove vent caps from both the booster and the
discharged batteries. Lay a cloth over the open vent
wells of each battery. These two actions help reduce
the explosion hazard always present in either battery
when connecting "live" booster batteries to "dead"
batteries.
Attach one end of jumper cable to the positive termi-
nal of the booster battery (identified by a red color,
"+"
or "P" on the battery case, post or clamp) and
the other end of same cable to positive terminal of
discharged battery.Do NOT permit cars to touch
each other, as this could establish a ground connec-
tion and counteract the benefits of this procedure.
Attach one end of the remaining negative cable to the
negative terminal (black color, "-" or "N") of the
booster battery and the other end to the negative ca-
ble attachment at front of engine of the vehicle (do