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Diagnosing No Start 850 1996

posted by  B.B. on  Sun Feb 10 06:51 CST 2019
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last visit: Mon Oct 6 13:15 CST 2014
[RELATED]

Hi Dennis,

Where in N Vt? I have a pal in Guildhall, and been there for -40F.

I just wrote this up last month. See this, the basic circuit:
https://www.brickboard.com/AWD/volvo/1661586/850/wont_start_diagnosis_info.html

and this, more details for the series interlock switches 2/28 & 3/71
https://www.brickboard.com/AWD/volvo/1661593/850/wont_start_diagnosis_info_part_2.html

If the battery is OK (and you have serviced the battery terminals?)
and the starter wont spin. Measure +12VDC at the service socket with the Voltmeter when turning key to START to confirm that the ignition switch is working. Then put +12V to the service socket if it starts then the interlock switches are OK.

Bill






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