Custom Battery Cables Home
Battery Cables for Cars, Trucks and Jeeps:
F150 & Bronco
1987-99 F250 & F350
1999-2003 F250 & F350
Jeep Cherokee and Grand Cherokee
Willys and Military Jeeps
1994 - 1998 Dodge Ram 2500/3500 5.9L Cummins
1998 - 2002 Dodge Ram 2500/3500 5.9L Cummins
2003 - 2007 Dodge Ram 2500/3500 5.9L Cummins
2007 - 2009 Dodge Ram 2500/3500 6.7L
Project Snow Leopard FJ dual battery set
Battery Cables for Other Applications:
2 gauge Golf Cart Cables
2/0 Cables for Solar Battery Banks
Braided Ground Cables
Booster (Jumper) Cables
Made-To-Order Custom Battery Cables:
Accessories, parts and tools:
NOCO Genius Wicked Smart Chargers
Battery and Cable Accessories
Battery Cable Repair Kits
Buy Wire, Terminals, Lugs, Heat Shrink and Tools
Clearance and discount cables.
Technical Info and Other Useful Stuff:
Do You Need New Cables?
Battery Cable Tips and Tricks
Different types of Cable Ends
Different Wire Types
What size cable do you need?
Wire size, thickness, amperage
How we assemble cables
Beware of PayPal Scams
After answering numerous questions about different battery isolator schemes,
I decided it would be easier to just build a web page... Below you will
find the basic design of 3 types of battery isolators with the pro's and
con's of each.
I got an email from someone scolding me that I was
not telling the whole story and claiming diagrams were simplistic
(overly simple). That is all true. The diagram below are
intended as an overview and some details are missing from the diagrams.
The Diode Battery Isolator
The diode type battery isolator
uses semiconductor diodes to split the current from the alternator
or generator and charge 2 or more batteries at the same time.
One battery is used to start the engine the other is used to run
the accessories. The load on the accessory battery does not
drain the starting battery so it remains charged even when the accessory
battery is run down.
Pros: no user action needed
Cons: May requires some wiring
changes -- you need to separate starter/ignition from accessory
wiring. This could be complex in a modern vehicle.
Some vehicles will need the VSense line connected to alternator.
battery switch allows you to switch between 1 or more batteries
and sometimes between a combination of batteries. A common
battery switch lets you choose battery 1, battery 2 or both.
Which ever battery you choose is connected directly to the engine,
alternator and accessories. The switch lets you drain one
battery, then switch to another to start the engine. You must
then switch to "both" in order to charge both batteries or have
a separate diode-type battery isolator.
Pros: No need to separate starter/ignition
wiring from accessory wiring.
Cons: Requires user to manually
switch between batteries.
Heavy battery cables must be run to the switch
solenoid isolator uses a continuous duty solenoid to connect the
auxiliary battery during certain times (like starting and charging) then disconnects it when not in use. The solenoid
can be switched to be on all the time, off, or on with ignition
depending on how the switch is wired.