Join Date: May 2004
Location: Hamilton, Ontario, Canada
You do NOT want to disconnect the battery cable while it's running. The battery helps with voltage regulation. It's kindof a giant capacitor which helps the voltage remain at 14 and stable. With no battery on, your voltage will go above 14vdc. A lot of your sensors are not designed for 16-18 volts and can be damaged, particularly the computer.
Check the battery voltage when it sits there, jeep off: 12.8(ish)
Check the battery voltage when the jeep is running: 14(ish)
Check the alternator voltage (post regulator) when the jeep is running: 14(ish)
Check the alternaor voltage with battery disconnected, it is quite high... the batter pulls it down to a happy medium.
That stunt is OK on old vehicles, not anything with a computer. (unless you are OK with misc. component failiure.
*98 CHEROKEE SPORT
*RE3.5 W/ EXTREAM DUTY LEAF PACKS, OME SHOCKS (4.5")
*TRXUS M/T's, 31X10.5 on 15x8 (3.25"BS?)
*IPF light housing w/ PIAA bulbs (4300kCalvin)