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  • 8v92 will not start

    Posted by Bill on May 31, 2020 at 10:34 am

    Last week my rig started after I topped off my antifreeze overflow tank. This week it will not start period, although it rolls over strongly with starter motor engaged. Normally two lights go on in the warning gauges as the ignition is turned on. After these two lights go out which is about 20 seconds, I can engage the starter and the engine fires up. These two lights are not coming on at all! Any suggestions?

    darrell replied 6 years, 3 months ago 4 Members · 3 Replies
  • 3 Replies
  • Joe

    Member
    May 31, 2020 at 1:52 pm

    If the two lights are not comng on it suggests DDEC is not getting power. Check the three DDEC CB’s in the rear electric box (CB 19,20,21). Check grounds, connections etc.

  • Ronald

    Member
    May 31, 2020 at 3:06 pm

    check battery voltage. should read at least 12.75 each at rest. ddec requires min 11.5 to even operate. where are your batteries? example read 12 volt on meter actually= 50% charge

  • darrell

    Member
    June 1, 2020 at 8:21 am

    I think Bob may or may not be dead on. The Prevost 12/24 volt chassis battery system can have ample 24V power to spin the engine, but if the 12 volt side of the battery system is low the bus will not start.

    Usually when that is the case you have a battery balance light lit up on the dash. That was not mentioned so in my comments above I did not think the problem was related to battery power.

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