[TR] Electric Fan relay

[Jim Wallace]

 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

>
> ------------------------------
>
>
> 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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