I've filed thru the forum and have not found much about anyone repairing their Guidematic system. This is something that is low on my to-do list as the dim/brights work just fine on my 64 Fltwd, but is something I would like to make functional in the future. 

Has anyone endeavored on this? Is it difficult? Impossible? How "gimmicky" is it when functioning properly? Unfortunately, I do not have a time machine to see how these functioned from the factory. 


Views: 69

Reply to This

Replies to This Discussion

The 1964 Guide-Matich headlight control systems ins covered in the 1964 Cadillac shop Manual on pages 12-85 to 12-92. My 64 Coupe de Villes came with this feature, was disconnected at some point and is one option I will probably never try to get back working or would install on another car. I am told, and believe with the many lights we have on the road and everywhere now in city and suburban driving, the headlights would be constantly going back and forth from low beam to hi beam to low beam. If in a rural area I could see this as a much more useful feature. Perhaps others that have this feature working can chime in and let us know there experience.

Personally, after owning a 64 with a working Sentinel headlight control on another driver car for a few years way back, that would be the headlight control system I would like to add to my 64. On at dusk, off at dawn, and a delayed shut-off as you exit the car. That is also a feature that I remembers impressing people the most as I would exit my car at night (or more often my early morning commutes to the parking deck at work), when people would remind me that I had left the headlights on and would say, give it a few seconds.  You can adjust the delay time, and found this to be a nice feature exiting in dark area.
Just my 2 cents. Check out the Shop Manual for details on both systems.

I wondered about how it would react with as much light on the roads we have today as you mentioned. 

I have driven a modern Cadillac with the auto headlamps and quite enjoyed their functionality. I’m guessing they have greatly improved that tech as streetlight and other ambient light sources seemed to have no affect on whether they were on or off. This is a big contributor to if I would invest time and resources into repairing the system as I do live in a fairly rural area, but do encounter my fair share of street lights. 

Thanks again for the excellent report!




  • Add Photos
  • View All


KleerView/OptiKleen Bottle Location

Started by Logan Robb in 1963/64 Cadillac Specific Discussion. Last reply by Logan Robb 6 hours ago. 3 Replies

I just received a repop KleerView bottle and label for my 64 Fleetwood this morning. Wondering where the best location for this bottle would be? Or rather, where was it most commonly installed?I…Continue

Current 1963/64 Cadillac Listings on eBay

Started by Jason Edge in 1963/64 Cadillac Specific Discussion. Last reply by Jason Edge 21 hours ago. 1 Reply

To see all 1963/64 Cadillacs Listed on eBay in the USA…Continue

Tags: ebay

1964 A/C Delco Parts book for Deville

Started by Mark Bartlett in General Discussion. Last reply by Jason Edge yesterday. 1 Reply

Is there a place to go to buy or look at original parts book ThanksssContinue

differential seal

Started by Al zink in 1963/64 Cadillac Specific Discussion. Last reply by Al zink on Monday. 2 Replies

Can anyone provide me with a good source for a differential seal for my 63 cadillacThanksContinue

Blog Posts

Lower Front End Ball Joints

Posted by Logan Robb on May 11, 2023 at 9:04am 7 Comments

Good Morning all! 

I took the 64 into the shop to have some adjustments completed and in the process decided to have the lower ball joints replaced as was recommended the last time I had it in. I ordered the parts and came into the shop. They quoted me nearly $500 to replace those lower ball joints requiring nearly 4hrs of labor. Now this is a reputable shop and they know me by name here and they will continue to get my business. I am just questioning what on earth is…


1964 power steering sector rebuild

Posted by CHRIS CARLSON on March 20, 2023 at 11:32pm 3 Comments

 I'm having my steering sector rebuilt, and considering changing it from 20-1 ratio 4.2 turns lock to lock to 3.5 turns lock to lock @ 16-1 ratio, If i change from a 3 1/4" box to a 3" box i could have a 14-1 Ratio steering response would be faster, shorter distance to turn the wheel to get a response,   has anyone done this? and how do you like it? thank you

1964 Daville dashboard clock

Posted by Willem Bol on March 13, 2023 at 11:33am 2 Comments


Can somebody help me finding a dashboard clock  for my 1964 Cadillac DeVille Convertible?

Thank you in advance,

Willem Bol

The Netherlands

Does anyone know where I can get the bushings for AC compressor mount on the 429?

Posted by Robert Schles on February 21, 2023 at 11:45am 2 Comments

I've looked at the usual rubber sources but couldn't find any. 


  • Add Videos
  • View All

© 2023   Created by Jason Edge.   Powered by

Badges  |  Report an Issue  |  Terms of Service