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PNP Switch 850 1995

posted by  someone claiming to be Barnyardie on  Wed Dec 24 05:21 CST 2003 [RELATED]

A couple people suggested replacing the PNP switch will cure my starting problems when I posted a question a couple days ago (http://www.brickboard.com/AWD/index.htm?id=725998).

I understand a bad PNP switch would cause transmition problems. But, how does a PNP switch problem cause starting problems? What is the link between the two?

Also, what is a ballpark estimate on what a service shop would charge for a PNP switch replacement (parts & labor)?

Thanks for the help.








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PNP Switch 850 1995

posted by  TomL on  Wed Dec 24 12:21 CST 2003
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last visit: Sun Jul 25 18:24 CST 2010
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The real name for the switch is "Neutral Safety Switch" or "Gear Position Switch"
It lets the ECM and transmission know what gear the transmission is in and if it is not in either park or neutral the engine will not crank. There are 4-5 switches in the assembly. The contact springs get gummed up with dried out greese and intermittent contact results. The switch can be carefully dissembled, cleaned, relubricated, and reassembled if you are inclined to do so.
The switch is available through AutoZone.com or can be ordered at teh stores for 75% less than Volvo dealer prics. ($54)
--
Tom 69-1800S, 72-1800ES, 96-850T








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PNP Switch 850 1995

posted by  WALDO850 on  Wed Dec 24 15:57 CST 2003
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FYI: PNP switch = Park Neutral Position switch


--
Jack







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