[TR] Electric Fan relay

[DAVID MASSEY]

 Yes.  He was correct on everything up until he called out the stripped end as the anode.
Many (but no all) DVM's have a diode check function.  You can verify the direction with that.  Your red lead will be positive.  
 
Dave 


 
 
-----Original Message-----
From: Jim Wallace <grandfatherjim at gmail.com>
To: triumphs at autox.team.net
Sent: Thu, Jun 16, 2022 3:24 pm
Subject: [TR] Electric Fan relay

 Ron,I believe the diode should be installed the other way. The way you have described it, it will conduct positive straight to ground.Jim

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From: ronald.olds at mchsi.com
To: keithstewart at bell.net
Cc: triumphs at autox.team.net
Subject: Re: [TR] Electric Fan Relay
Message-ID:
        <806236043.1685117.1655398950108.JavaMail.zimbra at mchsi.com>
Content-Type: text/plain; charset="utf-8"

Keith, 

I would recommend connecting a 1N4004 diode across the positive an the ground terminals of the relay coil. Connect the cathode end of the diode to the positive terminal and the anode end (the end of the diode with the line om it) to the negative terminal. this will have no effect when the relay is energized. When a relay is denergized it generates a spark which can burn the points. The diode will allow this spark to travel through the diode and dissipate. 
Connect to relay negative connection. Connect to the relay positive terminal. 

Diodes should be across the terminals of all relays and solenoids. 

Ronald Olds 


From: keithstewart at bell.net 
To: triumphs at autox.team.net 
Sent: Thursday, June 16, 2022 11:38:04 AM 
Subject: [TR] Electric Fan Relay 

I have a 62 TR4 with Trim Line electric fan, Derale fan controller, 30 amp fuse, and 30 amp NAPA relay. In the past 5 or 6 years, I have likely replaced the relay six or seven times. The wiring seems pretty straight forward and all seems in order. I really have no idea where to look next. Any suggestions?

Keith Stewart 

keithstewart at bell.net

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