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1smartcarguy
1smartcarguy, Honda Technician
Category: Honda
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Experience:  assoc. degree in auto technology.
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1999 Honda Civic: the blower motor to work only on high speed..1.6l

Resolved Question:

What would cause the blower motor to work only on high speed on a 1999 Honda Civic 1.6l engine?
Submitted: 4 years ago.
Category: Honda
Expert:  1smartcarguy replied 4 years ago.

Hi, thank you for using justanswer.com. My name isCustomer XXXXX i will help assist you today.

 

What model civic is this? ex/lx/si

 

Just to double check you replaced the power transistor as located in the diagram below.

graphic

Customer: replied 4 years ago.
Yes, the power transistor was replaced as indicated. Vehicle vin# XXXXX XXXXX What model civic is this?
Expert:  1smartcarguy replied 4 years ago.
Is it a single cam or dual cam engine?
Customer: replied 4 years ago.
It is a single cam engine (already stated in 'optional information'.
Expert:  1smartcarguy replied 4 years ago.

Sorry, overlooked that.Surprised

 

here is the testing procedure for the system. You either have a bad power transistor - out of the box, bad wire, or the actual heater control panel will need replaced.

 

You will have to perform the test below with a multimeter. The usual fix for this is the power transistor, but since that didn't work it would leave me to believe you might have a wiring issue as I hardly ever replace the heater control panel. It is possible though.

 

graphic

 

graphic

 

 

 

 

Hope this helps

Customer: replied 4 years ago.
What in your opinion is the simplest way to go about resolving this problem? Also .what model civic is this?
Expert:  1smartcarguy replied 4 years ago.

The easiest thing to do if you are not able to diagnose with the steps above would be to just go to a junk yard and get a new heater panel assembly for a couple bucks. If it doesn't repair it then you will have to start tracing the wires for a broken wire or burnt wire.

 

This model civic would depend if the engine says vtec on it or not. vtec would be an EX model, and a DX if it doesn't say vtec. If you don't have power windows or door locks either then it is a LX

 

 

Though if you simply have a piece of wire to use as a jumper wire. You can perform some of the tests above pretty easily and could probably narrow it down with that some.

 

 

 

 

Hope this helps

1smartcarguy, Honda Technician
Category: Honda
Satisfied Customers: 610
Experience: assoc. degree in auto technology.
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