Volvo RWD 700 Forum

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91 740 blower problem 700

posted by  zulatr on  Sun May 14 12:52 CST 2006
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last visit: Thu Jan 6 18:50 CST 2011
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My Chilton manual has no useful information, and no wiring diagram for the blower. Mine runs on high only. I pulled the resistor pack and nothing looks burned. I have power to one side, and none on the other side of the reisistor pack. There's a diode, or something, that has power on one side and not the other. When I jump 12v to the other side of the resistor the blower runs.

does this mean the resistor is bad?

While I'm at it, is there a better manual than the chilton, this one goes from 90-93 700/900/200 series cars? It's just about useless.








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91 740 blower problem 700

posted by  someone claiming to be rod on  Sun May 14 12:57 CST 2006 [RELATED]

http://www.brickboard.com/FAQ/700-900/HeatingAirConditioning.htm#BlowerMotorOnlyRunsHigh








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91 740 blower problem 700

posted by  Blue Horse on  Mon May 15 01:11 CST 2006
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last visit: Mon Apr 8 17:57 CST 2013
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Haynes manual #1550 (US) covers 7s from 83-88. It is readily available for about $15-20. There is also a UK version that includes the B234 16V engine and goes a couple of years newer. IPD has these. Either one is far better than a Chilton. They have wiring diagrams though there are quite a few differences between an 88 and a 91, so that part may not be quite as useful.







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