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Car will not start 1986 740 turbo

Car tried to turn over then now nothing. battery fine, fuel relay new,starter fairly new... when I was turning the key I did notice some "smoke" coming from under the hood, smelled like anti-freeze. It seemed to be coming from the starter, (above) where the lead runs from the pos. term. on the battery... Checked connection, they are fine. Car just doesn't seem to be getting enough of a boost. Is there a regulator or something that could affect the current going to the starter? I have been having problems with my ignition switch, too many things happening at once getting confused as to where to start. Any idea?

I may not know all the lingo, but I work quite a bit on my car & am always willing to learn. I have owned my B230 for 11 years, 365K, just give it to me in laymen terms and I will figure it out. I just need a course of attack to resolve problems logically. Anyone?








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    Car will not start 1986 740 turbo

    Smoke signal could mean starter problem.

    You can eliminate (bypass) Ignition Switch as a diagnostic step by running a jumper from Battery + to starter terminal 50. The engine should turn over/crank as with the Key. (Or the smoke will reappear!)

    I'm more familiar with 240, but a glance at the Haynes 740 diagram tells me that terminal 50 has Blue/Green wire(s) attached.

    There may even be a terminal up on the firewall (as on 240) where the mechanic can apply +12V to "bump" the starter. On 240 its a red wire with a Black plastic insulated female terminal . No idea about 740—may be similar.

    Hope some others will ring in now,

    --
    Bruce Young,
    '93 940-NA (current)
    '80 GLE V8 (Now gone)
    '83 Turbo 245
    '73 142 (98K)
    '71 144 (track modified--and still here)
    New 144 from '67 to '78
    Used '62 122 from '63 to '67







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