[TR] Electric Fan Relay

[ronald.olds at mchsi.com]

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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