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93 850 with 256k stalls and won't start

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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mbarron
Posts: 11
Joined: 8 June 2008
Year and Model: 2006 v50
Location: michigan

Re: 93 850 with 256k stalls and won't start

Post by mbarron »

Hey guys I think I found something.
The 1590 ohms at pin 87 did not seem right.
I tested the resistance at pin 87 with the
ignition turned on, it read 2.6 Mega Ohms.
I don't know the specs for the fuel injector
current, but it would be a very tiny current
flowing at 12 V through that kind of resistance
- or am I looking at this wrong?
Where do I find the other end of the wire at pin 87
of the main fuel injector relay?
Thanks for much for reading.
____________
/ \
| 87 30 |
| |
| 85 86 |
| |
----------------

87 Thick Green
30 Thick Red
85 Thin Brownish
86 Thick Red

With Ignition Off
-----------------

Wire To Grnd Volt - To Grnd Ohms
87 0.0 1590
30 12.6 16 Meg
85 0.0 infinite
86 12.6 16 Meg

With Ignition ON
----------------

87 0.0 2.6 Mega ohms
30 12.6
85 0.0
86 12.6

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