Cadillac & LaSalle Club Discussion Forum

Cadillac & LaSalle Club Forums => General Discussion => Topic started by: lentel on October 02, 2020, 02:48:17 AM

Title: Relay for 74 deville ac blower help question...
Post by: lentel on October 02, 2020, 02:48:17 AM
Anyone know where to find this relay. I believe it is the auto relay for the ac blower. Its on my 74 deville
I found what the repair manual calls the lo relay but cant find this configuration
thanks for any help I am replacing the ambient sensor, thermal fuse and a couple other ac blower related items that are really crusty and look bad

Title: Re: Relay for 74 deville ac blower help question...
Post by: TJ Hopland on October 02, 2020, 12:24:13 PM
Not the greatest photo but to me it looks like its just mostly dirty.   The terminals don't look especially corroded especially given its age. 
Title: Re: Relay for 74 deville ac blower help question...
Post by: V63 on October 03, 2020, 03:54:46 PM
I have used ones?
Title: Re: Relay for 74 deville ac blower help question...
Post by: cadillacmike68 on October 04, 2020, 11:30:30 AM
That is the Blower Fan Relay. There is probably a LO-AUTO Switch mounted ON the dash control unit, which is Not a relay.  I'm not very familiar with 71 & later, but there were still 2 or 3 hokey switches On the control unit back then. And they do go bad.
Title: Re: Relay for 74 deville ac blower help question...
Post by: Trace on October 04, 2020, 02:32:30 PM
Mine was going bad .... intermittent operation. They are really simple and as long as the coil circuit is complete, you can pull those apart and repair/clean them. The relay works great now.