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Old 16th April 2019
packardv8 packardv8 is offline
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Join Date: Jan 2013                                                
Location: spokane, wa, usa
My Saabs: '95 9000 Aero, '98 CSE, '05 9-5, '11 9-4
Posts: 61

The first attempt to jump start was with the battery in place and prior to discovering the battery was toast. Most cars will jump start across a dead battery.

The second attempt was after the battery was removed. The jumper cables were attached directly to the 9-4X battery cables from a running 9-5. Again, most cars will jump start from another running vehicle. There's more than 12-volts across the posts, so why not?

I bought a new battery, charged it overnight and saw 14.5 volts across the posts. The 9-4X started immediately.

jack vines
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