ultima 53-645 wiring
07-20-2018, 08:05 AM
Join Date: Oct 2012
Location: florida
Posts: 155
ultima 53-645 wiring
my crane hi4 took a dump(pos), friend gave me a 53-645,early model single fire ultima is no help,they only show the 644 programable..any help?
07-20-2018, 10:45 AM
Join Date: Jan 2011
Location: Haslet Texas
Posts: 20,999
Likes: 0
Have you called Ultimas tech line?
07-20-2018, 04:09 PM
Join Date: Aug 2008
Location: Ohio
Posts: 4,898
07-20-2018, 07:00 PM
Join Date: Aug 2008
Location: Ohio
Posts: 4,898
The 645 is the old pre-set big cube module, it will be set for little timing advance, see if the wire colors are the same as the 644 in the wiring diagram, they should be the same. The factory preset module in a 127 has the same wire colors as a Ultima 644
07-21-2018, 09:55 AM
Join Date: Aug 2006
Location: Southern MD
Posts: 281
Likes: 0
Check to see if there is a bank of switches under the label. I've heard Ultima covered the switches on ignitions sold with their performnce engines.
07-24-2018, 07:55 PM
Join Date: Oct 2012
Location: florida
Posts: 155
thanks to everyone
I ended up puttin the old work horse stock ignition back in...
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