How to check for bad relays in fuse box? - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
 
LinkBack Thread Tools Rate Thread Display Modes
post #1 of 8 (permalink) Old 07-16-2005, 05:40 PM Thread Starter
Intrepid Modder
 
Join Date: Jun 2004
Location: Kentucky
Posts: 653
Feedback: 0 / 0%
                     
How to check for bad relays in fuse box?

Hey guys,

A few days ago I checked in the fuse box of the engine bay & found a blown fuse to a radiator fan. There was some suggestions to check the relays.

Well I'm wondering how do I go about checking to see if the relays in the fuse box are good or bad? I'm glad I asked this because this would be some useful information for me to carry down the road whenever I might have a possible problem with my car. Thanks!
Communicator7 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old 07-16-2005, 08:53 PM
Intrepid Pro
 
ESMIKE96's Avatar
 
Join Date: May 2004
Location: Hell (cleveland ohio)
Posts: 2,893
Feedback: 0 / 0%
                     
Basicly.

If your fans arnt working. And you think its a relay. Switch the fan relay with anouther relay thats in the same area as the fan relay. If your fans kick on then it was the relay. If they dont its not the relay.

Im sorry I cant be more of a help but its the only way I know how to check them.
ESMIKE96 is offline  
post #3 of 8 (permalink) Old 07-16-2005, 11:23 PM
Intrepid Pro
 
froggy81500's Avatar
 
Join Date: Jul 2004
Location: Upstate, NY
Posts: 4,388
Feedback: 0 / 0%
                     
You have to figure out which are the two terminals for the field coil. Then you need to connect 12 volts to the positive and ground the negative and you will hear a "click" and might even feel it. Peppa boy's idea will work if you swap relays with something that you can turn on and off like the wipers (if they're the same relay) and you'll now for sure if the relay is bad or not. My instructions are just in general for any relay but for the car, try what peppa suggests.
froggy81500 is offline  
post #4 of 8 (permalink) Old 07-16-2005, 11:53 PM
Intrepid Modder
 
Join Date: Apr 2005
Posts: 982
Feedback: 1 / 100%
                     
The easiest way to check the relay is to do as Peppa Boy suggested and swap it with a known good relay. If you want to electrically check them the 2 outer parallell pins in the row that has 3 pins are the coil,(#85is negative and 86 is positive if they are numbered ) put 12volts to them and you should hear the relay click or check the other 3 pins with ohmmeter they are a common, normally closed and normally open
lextrep is offline  
post #5 of 8 (permalink) Old 07-17-2005, 12:07 AM
Intrepid Pro
 
Join Date: Aug 2003
Location: Minni-snow-ta
Posts: 2,536
Feedback: 3 / 100%
                     
I just replaced the high and hi/low relays.

They cost $6 each.
'98-ESer is offline  
post #6 of 8 (permalink) Old 07-17-2005, 03:48 AM Thread Starter
Intrepid Modder
 
Join Date: Jun 2004
Location: Kentucky
Posts: 653
Feedback: 0 / 0%
                     
Hmm, good ideas. I'll switch them out & see how it goes. 98-Eser, I wonder why made your hi/low relay went bad?
Communicator7 is offline  
post #7 of 8 (permalink) Old 07-18-2005, 07:35 AM
Intrepid Pro
 
alarkyokie's Avatar
 
Join Date: May 2003
Location: Cain't get there from here...
Posts: 1,992
Feedback: 0 / 0%
                     
If the need comes up to check a relay further, (and you have a meter),apply 12v as
stated above. Connect ohm meter across the other contacts and verify that the
contacts are electrically closing. Remove the 12v and the contacts should open.
There may be "normally open"(NO) contacts, and "normally closed"(NC) contacts,
which describes the no power applied state.
alarkyokie is offline  
post #8 of 8 (permalink) Old 07-18-2005, 08:49 AM
Intrepid Pro
 
Join Date: Aug 2003
Location: Minni-snow-ta
Posts: 2,536
Feedback: 3 / 100%
                     
I only brought up the relays because of their low price. You can spend all day (or more) chasing down electrical problems or 'invest' in a 6 dollar part.

If you suspect a relay of being bad, you have to consider that it may only be failing under the heat/cold extremes *or* engine vibration *or* a combination thereof. Simply testing them for how they react to 12 volts on a workbench won't tell you if you the relay is good or not. It just tells you that it works ok on the bench.

Sometimes it pays just to replace the cheap parts. Those relays get a constant workout in the harsh under-hood environment.

"It's not what you can do, it's what you **will** do." Cap'n Jack Sparrow

'98 ES sold at 119k one-owner miles.
Current daily driver: 2007 Deep Red Pearl Mitsu Eclipse GT 3.8l Sportronic

10000 mile driver report due soon.

Lots 'o stuff for sale:

http://www.dodgeintrepid.net/forums/...d.php?t=109484

Last edited by '98-ESer; 07-18-2005 at 08:52 AM.
'98-ESer is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionaly, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome