Author Topic: 1970 Eldorado Power Seat Just Clicks  (Read 127 times)

Offline 76eldo

  • Posts: 4944
    • CLC Member
      CLC Member #22443
  • Name: Brian Rachlin
1970 Eldorado Power Seat Just Clicks
« on: November 12, 2017, 09:18:03 AM »
I just purchased a 1970 Eldorado with front buckets and a console.  The driver's front seat is pretty far up and when I hit the buttons for any direction it just clicks.  So I assume that is the relay clicking?  Seat has been in the same position for a long time so the motor may be stuck?

Thanks,

Brian
Brian Rachlin
Huntingdon Valley, Pa
CLC # 22443

I prefer email's not PM's   rachlin@comcast.net

1960 62 Series convert with factory Tri Power
1960 Eldorado Seville
1970 DeVille convert
1976 Eldorado convert
1980 Eldorado Hess & Eisrnhardt convert
1981 Eldorado Hess & Eisenhardt convert
1985 Eldorado Biarritz convertible
2007 DTS
2012 CTS Coupe
2017 CT5

Offline TJ Hopland

  • Posts: 6791
Re: 1970 Eldorado Power Seat Just Clicks
« Reply #1 on: November 12, 2017, 10:29:09 AM »
Im not positive about 70 but typically 2 things happen when you hit a seat switch.   Part one is a solenoid in the transmission selects the proper gear.   Part two is a relay starts the motor in the proper direction.   You are likely hearing the transmission engage but not getting any motor. 

If its like later years its a odd setup like the 71-76 tops where the field runs direct but the armature is in the relay so it will run with partial power till it burns up.  I may have it backwards, how ever it is its split up.   Its not like a window motor. 
StPaul/Mpls, MN USA

73 Eldo convert w/FiTech EFI
75 Eldo rusty but trusty
80 Eldo Diesel
And other assorted stuff I keep buying for some reason

Offline 1976Deville

  • Posts: 37
  • Name: H Wandt
Re: 1970 Eldorado Power Seat Just Clicks
« Reply #2 on: November 12, 2017, 12:41:36 PM »
I cleaned and fixed the seat on my Cadillac

 http://canadianponcho.activeboard.com/t52070477/restoring-a-60s-vintage-gm-6-way-power-seat-unit/

I used Super Lupe Silicon grease . Must be for Plastic and Metal
« Last Edit: November 13, 2017, 09:33:52 AM by 1976Deville »

Offline cadillacmike68

  • Posts: 1139
  • Still finishing up this 1968
    • CLC Member
      CLC Member #15823
  • Name: M Santos
Re: 1970 Eldorado Power Seat Just Clicks
« Reply #3 on: November 12, 2017, 12:54:24 PM »
I need to clean mine out. It does every direction except forward fairly well. Forward - well, I have to help it.
Regards,
"Cadillac" Mike
Current:
1968 DeVille Convertible
1996 Fleetwood Brougham
2009 STS NorthStar Platinum ed RWD
2011 CTS PRemiun ed Sedan RWD
Past:
2008 CTS Premium ed Sedan AWD
2005 CTS Hi-Feature Sedan RWD
2000 ElDorado ESC Hard Boot Convertible
1995 Fleetwood Brougham
1973 Sedan DeVille
1970 Fleetwood Brougham
1969 DeVille Convertible

Offline TJ Hopland

  • Posts: 6791
Re: 1970 Eldorado Power Seat Just Clicks
« Reply #4 on: November 12, 2017, 07:43:36 PM »
The lubricants are not very slippery anymore especially exposed stuff like the forward and back tracks. 

Usually if its a lube issue you will get slight movement before it binds.   A clue to if the motor is trying to run is look for the interior lights to dim slightly.   
StPaul/Mpls, MN USA

73 Eldo convert w/FiTech EFI
75 Eldo rusty but trusty
80 Eldo Diesel
And other assorted stuff I keep buying for some reason

Offline 76eldo

  • Posts: 4944
    • CLC Member
      CLC Member #22443
  • Name: Brian Rachlin
Re: 1970 Eldorado Power Seat Just Clicks
« Reply #5 on: November 12, 2017, 07:46:31 PM »
Thanks for the responses.  I think the click, which is more like a clunk would be the trans solenoid.  Is there a relay for the motor that could be bad? 

Thanks,

Brian
Brian Rachlin
Huntingdon Valley, Pa
CLC # 22443

I prefer email's not PM's   rachlin@comcast.net

1960 62 Series convert with factory Tri Power
1960 Eldorado Seville
1970 DeVille convert
1976 Eldorado convert
1980 Eldorado Hess & Eisrnhardt convert
1981 Eldorado Hess & Eisenhardt convert
1985 Eldorado Biarritz convertible
2007 DTS
2012 CTS Coupe
2017 CT5

Offline Jeff Rose CLC #28373

  • Posts: 1405
  • Name: Jeff Rose
Re: 1970 Eldorado Power Seat Just Clicks
« Reply #6 on: November 12, 2017, 08:52:38 PM »
Mine just clicks unless the car is running. I think it is because battery voltage isn't enough to overcome the resistance in the circuit. When the alternator is online there is a little more voltage. My guess is that I have corroded connections. Need to clean them but I never move the seat so it isnt a problem. It is on my "I will get to it someday" list.
Jeff
« Last Edit: November 12, 2017, 08:54:52 PM by Jeff Rose CLC #28373 »
Jeff
CLC #28373
1970 Coupe DeVille
1955 Series 62

Offline TJ Hopland

  • Posts: 6791
Re: 1970 Eldorado Power Seat Just Clicks
« Reply #7 on: November 13, 2017, 03:46:50 AM »
There is likely a relay.    Its likely an odd setup.   The motor has a ground that is tied through a thermal switch to one brush and both field windings.   The other brush is tied to the relay contact.    Each of the other end of the field windings goes to the relay coil.  The control switch also goes to the relay coil.   Switch selects forward its sending + to both one side of coil and one field of the motor.  The other field has its other end grounded so to a small load like a relay its going to look like a ground so the relay will engage.   Switch selects reverse and it sends power to the other field so the first one is ground so relay again pulls in.   
StPaul/Mpls, MN USA

73 Eldo convert w/FiTech EFI
75 Eldo rusty but trusty
80 Eldo Diesel
And other assorted stuff I keep buying for some reason