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Unread 05-16-2014, 10:22 PM   #1
pecos
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1986 CJ7 
 
Join Date: Mar 2007
Location: new mexico
Posts: 57
Msd wiring help

Installed msd 6a. And crt performance juice box. Engine fires up fine but getting run on. I connected lg red wire directly to batt. And for the small red switched wire i used the harness supplied by summit with diode already attached. Im stumped, where could ignition be getting power.

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Unread 05-16-2014, 10:33 PM   #2
WindKnot
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1977 CJ7 
 
Join Date: Mar 2011
Location: Kaibab Plateau, Northern Arizona
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The diode should be in the circuit from the alternator to the warning lamp in the dash. My year it's the small brown wire attached to the Delco 10SI alternator at terminal 1. If the diode is inserted backwards, it's the same as not being there.
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Unread 05-16-2014, 11:13 PM   #3
pecos
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Location: new mexico
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This is the harness used..http://m.summitracing.com/parts/SUM-850520


My understanding was this has the diode installed, so the diode at alternator would not be needed.
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