Car Repair Help by Professional Mechanics
Troubleshooting
/ Crank Engine
All Electrical Stops
When I Crank My Engine All The Electrical Stops
Electricity is an elusive substance that can be easily interrupted by a bad
connection or corrosion. When an engine is cranked over it demands a high
amount of electricity (amperage) from the battery. As the electrical
demand is increased heat will develop inside the wire or connection. This heat
will disconnect (short circuit) the electrical flow until the connection cools.
Since the battery provides the main electrical power to the remainder of the
vehicle (lights, dash, interior) all electricity is shut off. Once the
connection cools it can reconnect starting the process all over again. We have
listed below some of the most common problems and repairs.
Troubleshooting Procedure
1. Check Battery Cable Connection - The battery cable
connection must be clean (free from corrosion) and tightly fastened to allow the flow of
electricity from the battery to the starter. With the key in the off position
locate the battery and inspect the battery cable connections. Battery cable
connections must be tight and not wiggle on the battery terminal. If the cable
is loose remove it and clean, then tighten the cable with a wrench or socket
wrench. Use baking soda to neutralize any suspected acid residue before work
begins.
Clean and Tighten Battery Cables
2. Check Battery Cable Corrosion - The battery cables are used to
transfer electrical power from the battery to the starter. Battery acid causes
corrosion inside the battery cable and will inhibiting electrical flow. To check
for this condition look for bulges near the top of the cable, these bulges
indicate corrosion expansion caused by the chemical reaction between the acid
and copper wire. Remove the failed battery cable to replace with new unit, then
check charging system
to ensure proper operation.
Battery Corrosion
3. Inspect Battery for Bulging -
The battery supplies electrical power to the vehicle, when a battery short
circuits internally it can cause the car to lose power and gain it back again.
Inspect the battery; if the sides are bulging it could have a warped plate that
can short under certain conditions. To check for this condition the battery
needs to be disassembled which is very difficult, and should not be attempted.
This problem is rare but it does happen.
For exact specific repair procedures for any of the steps above visit our
online repair
manual page.
WARNING!
Always wear protective eyewear, gloves and necessary clothing before inspection
or work begins. Never crank an engine over when anyone is near the battery or
engine. A battery is filled with
explosive gases that can ignite when extreme heat or a spark is present. A
battery could have residual acid on the outside casing so use caution when
handling a battery and the surrounding area. Use baking soda to neutralize any
suspected acid residue before work begins.
Troubleshooting
/ Crank Engine
All Electrical Stops
Check Manufacturer Specific Engine
Cranks then Stops
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