Question about Cars & Trucks
Have you checked the fan relay to see if it is getting voltage and a ground signal from the computer ?
Posted on Jan 08, 2013
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Posted on Jan 02, 2017
On your VOLVO 850.
The Head Lights are Relatinated Directtly with the Ignition switch.
The ignition switch send 12v. Power to the MAIN HEAD LIGHT RELAY and BULB FAILURE WARNIG SENSOR. Incorporated in the Same relay.
Very Important check the Battery terminals, And few ground Below the Battery Holder.
The turn signal switch , has the Funtion to Change the Head lights to LOW or HIGH Beam.
Check for proper funtion.
On left side of the Engine compartment In the Fuse block.
Check the FUSE # 13, 15amp. Replace if need.
The TURN signal work with the Same FUSE # 13. 15 amp.
Related with the Turn Signal switch.
Ok. The blower MOTOR.
Some times work And some times not.
Check the ground wire "BLACK" Below right side of Instrument Panel. If the ground is OK..
Turn the Ignition key to RUN position,
SET the A/C fan to MAX position or HIGH position.
When the Fan is set to High The system make a BY pass At the Blowert motor REsistor. and use a Blower motor Realy to give a High speed.
Using a TEST LIGHT,
Check if There a POWER 12v. at the Green/red Wire.
If you found Power . Check if there a Negative 12v. at the Black WIRE. If you found negative 12v.
Replace the BLOWER MOTOR..
For the Instrument Panel. I recomend Check the FUSE # 3
In the fuse box, Left Rear of the engine compartment.
If the fuse is ok. Check for Power 12v. if you found power
check all the grounds. But if NOT. I recomend Replace the Ignition switch. Because can be the Cause of the Electrical problem in your car.
OK.. I hope this help to try diagnostic your vehicle.
Thank you for use fixya.
Posted on Aug 14, 2008
It sounds as though the solenoid on the starter is stuck. if it is a used starter a light tapping with a hammer may release it (very light). DON"T tap it if it is a new or rebuilt starter you may void your warranty. If it is a new starter it should have a warranty. If installed at a garage call them for warranty repair if you installed it yourself pull it off and take it back for replacement. Most places I deal with for starters and alternators, either new or rebuilt have least a 1 year warranty. mike
Posted on Jan 05, 2009
the relays control circuit is grounded by ECM (computer) . to check this make sure the is hot enough for the fans to be commanded on by computer and check to see if you have voltage at relay and it has ground from computer . you may need ECM.
Posted on Jan 28, 2009
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