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Registered User
Join Date: Mar 2010
Posts: 16
starter motor engaged

Am having problem with my s4 1991 A/T euro 928. When i start car, it seems the starter stays engaged. Changed ignition barrel. cam, electrical ignition switch ( all second hand from G.A.D.), also had starter refurbed, but exactly the same. Took starter off car, checked voltage at solenoid cable. When turned the key fully clockwise then solenoid cable shows 12v. Releasing key ( as when car starts) shows 12v on solenoid cable? Is this correct??
Old 05-21-2010, 09:33 AM
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JhwShark's Avatar
Join Date: Oct 2009
Location: SF Bay Area
Posts: 1,015
I'm not very familiar with the year, and I know you have a lot more electronics to deal with...
but the wires going down to the alt and starter on earlier models from a 14 pin connector (I believe you have a different config.) can have insulation degraded to the point that a short or an open will occur. This can cause a no start or a constant starter engagement. You may have some of this going on (i.e.: if the starter pulse wire connects with a HOT (ALT) wire due to bad insulation this could cause the condition you experience...many people have rewired the harness that goes down some have bought replacements...

Maybe it is just a stuck start relay or something easy...I hope you find out.
'79 928, 85k Opal Metallic
'99 BMW 540i, 97k Titanium
'72 BMW 3.0 csi, 85k km (euro Deutschland '82) Taiga
'74 1/2 MGB , 125k Sahara
Old 05-21-2010, 11:06 AM
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Maleficio's Avatar
Join Date: Mar 2010
Posts: 1,217
I had this same problem on an 87 Taurus. It was a sticking relay. I tapped on the relay with a tool and heard it spring open and stop the starter. I got lucky on that one.
Old 05-21-2010, 12:05 PM
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