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How do u test a fan switch?

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Old May 20, 2012 | 10:04 AM
  #1  
veegeepee's Avatar
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Default How do u test a fan switch?

I have a 95 Civic LX w/ some heating issues. The troubleshooting flowchart in the manual tells me to test continuity btwn terminals on my fan switch. Am I supposed to test continuity btwn 3 terminals? If so...how?

Thanks

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1995 Honda Civic LX parts:
Fan Switch...if mine is bad (see post)
Center panel
Projector Headlamps/Taillights

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Attached Thumbnails How do u test a fan switch?-95-civic-lx-fan-switch.jpg  
Old May 20, 2012 | 01:47 PM
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jump it with a paper clip, google jump fan switch if that doesnt make sense, if you are worried about the switch itself just replace it, they are like $8
 
Old May 20, 2012 | 03:27 PM
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Originally Posted by Turtlegrip
jump it with a paper clip, google jump fan switch if that doesnt make sense, if you are worried about the switch itself just replace it, they are like $8
Read the post, bro. I also attached an image. I was wondering how u test continuity between 3 terminals. At least, I THINK that's what the manual is saying.

Also, the lowest I've seen the switch is around $15. I haven't really looked that hard. I've already spent too much this month on the car. I was wondering...since a switch is pretty basic (a device to make a connection), Can I repair it?
 
Old May 20, 2012 | 04:48 PM
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You test one circuit at a time. For example in position 1 there should be continuity between 1 and 4 as well as 1 and 6. (and 4 and 6, but you don't really need to test that).

Typically when the fan doesn't work on high but does on other speeds, the switch is bad (since the position 4 circuit handles more current it is prone to burn out). If the fan works on high but not other speeds the resistor is probably bad.
 

Last edited by mk378; May 20, 2012 at 04:52 PM.
Old May 20, 2012 | 05:31 PM
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Originally Posted by mk378
You test one circuit at a time. For example in position 1 there should be continuity between 1 and 4 as well as 1 and 6. (and 4 and 6, but you don't really need to test that).

Typically when the fan doesn't work on high but does on other speeds, the switch is bad (since the position 4 circuit handles more current it is prone to burn out). If the fan works on high but not other speeds the resistor is probably bad.
Thanx, bro.

That's the way I thought I should do it (test two terminals at a time). OK, so the switch is bad. I wasn't hearing beepis on any combination. That's why I wasn't sure I was doing it right.

What do u think about my other question. Can I repair the switch? I was thinking of opening it up & making sure each connection would work as planned.
 
Old May 20, 2012 | 07:10 PM
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Fixed the fan switch. Got continuity like in the manual.

_______________________________________________

WTB:

1995 Civic LX parts:

Center panel
Aftermarket headlamp/taillight assemblies (projector, halo, something cool?)
Center caps

PM me
 
Old May 21, 2012 | 01:40 AM
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If they all share one post (wire plug) that one will usually be a common (ground) so like mk said you would just check from there. I just suggested replacement because that is usually a lot easier than trying to repair or worry about a switch, once it is worn it is worn unless you just had a break in a wire. Glad to see you got it working though, bro.
 
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