: Junkyard tech

11-15-05, 11:16 AM
Credit goes to N0DIH and Illumina for the idea...

Junkyards are unique in that you have access to parts from a wide range of cars at a (usually) reasonable price. You are also able to get a feel for the parts purpose and see how the factory installed it if your particular yard happens to be a "U-Pull-It" style yard. This comes in handy when using parts off of other cars, and adapting them to your own.

One common feature I add is express down windows. Many cars come with express down for the drivers side only, and usually have the express down built into the switch itself. GM cars like Bonnevilles and most Cadillacs used a seperate 4 wire module, allowing you to retrofit express down to almost any car with power windows, and to any window you choose. The module is also ruggedly constructed and well sealed from the elements. The module is a black rectangle, approx. the size of a pack of cigarettes and is located in the drivers side door. There are four wires going to it. It releases from its bracket by a tab you push toward the module and slide the module out. Wiring is straight foward, the pink wire gets spliced to the 12v feed at the switch (use a test light to find it with the key on). Next, unplug the window motor and find out which wire gets +12v when you hold the switch in the down position. cut this wire about two inches back and connect the Brown wire to the switch side, and the Brown/White wire to the motor side. Take the remaining wire and splice it to the remaining wire going to the window motor. Thats it, that window now has express down.

Another common mod is swapping clusters for digital ones. The only downside is the mileage stays with the cluster. If you couldn't care less, you might consider this mod. Here is a wire chat comparing the two clusters. (http://www.cadillacforums.com/forums/showpost.php?p=156811&postcount=10) Most of the wire colors are the same, just located in different spots on the connector. With a small screwdriver to release the wires from the connector, you can repin the connectors and make it work. Search for posts by my username on digital dashes for tons more information.

I also add Twilight Sentinel to cars not so equipped. The latest being a friends CRX. It looks complicated, but it is pretty easy to install. The wiring colors change from year to year though, so posting them doesn't help unfortunately. Older Devilles are the cars to get this out of, Sevilles have just about everything integrated into the BCM.

The latest project is a Heads up display from a Bonneville SSE. It is a standalone unit (not integrated into the instrument cluster) and seems adaptable to vehicles equipped with an electronic VSS. (may need a "yellow box" or some other form of adapter for ratios and such) The HUD includes Speed, Directional indicators, Low fuel warning, High beam indicator, and "Check Gauges" warning. The VSS input wants to see 4000 pulses to ground, per mile. This HUD is probably going to end up in the previously mentioned CRX. Picked up the display for $6.... Something to consider.

Anyone else have any good modifications from junkyard parts? Post them up!

11-16-05, 12:06 AM
Update: that HUD went in super easy, even with the other car being a completely different make. It would be nothing to put one of these in something like a deville..... ;)

11-16-05, 01:22 AM
Do you happen to have any pics of the HUD unit? Like, before you put it in the CRX?

11-16-05, 09:59 AM
Do you happen to have any pics of the HUD unit? Like, before you put it in the CRX?

Sure do. Its a small empty box with a few mirrors when you get down to it....


The Controls...


11-16-05, 10:15 AM
Sure do. Its a small empty box with a few mirrors when you get down to it....

That looks just like the Nightvision LCD projector in my car (mine was flooded so I gutted the box, but it's still there). The control is the same, too (I took mine out and replaced the knee bolster with a non NV one). Looks like it would be easy to add HUD from a Bonneville to my DTS. What year Bonnevilles had HUD?


11-16-05, 11:12 AM
Mid 90s Bonneville SSE and SSEi models, I think from 95 on up. Theres two kinds of HUDs, one has a motor adjustment, one a cable. The older ones are cable. They both should work, but one gives better flexibility in mounting the controls. They also were available in later Grand Prixs, but I haven't seen those at many junkyards yet.

11-17-05, 05:43 PM
That looks just like the Nightvision LCD projector in my car (mine was flooded so I gutted the box, but it's still there). The control is the same, too (I took mine out and replaced the knee bolster with a non NV one). Looks like it would be easy to add HUD from a Bonneville to my DTS. What year Bonnevilles had HUD?

Hmm, I spotted you on H-T. Take a look in the EF section. My friends username is CRXB16T he posted up pictures of everything and a nice write up (that I typed up mind you...)

11-17-05, 06:22 PM
Hmm, I spotted you on H-T. Take a look in the EF section. My friends username is CRXB16T he posted up pictures of everything and a nice write up (that I typed up mind you...)

Ummm....that's a different turbojimmy ;) Just kidding. It is my alter ego to an extent.

I do hang out there once in a while, in spurts mostly. I did chime in on the Caddy thread though. I saw that write up get posted today - nice work.


03-25-06, 02:07 PM
Do you have any wiring info on this swap? I have buddy at the dealer checking for a diagram for me, but he says most of their stuff dosnet go back that far?

11-14-06, 09:20 PM
The main problem retrofitting Bonnie and GP HUD's to Caddies would be in cutting the dash hole for the HUD Unit and securing the unit to the under dash area.

The 95-99 Bonnie SSE's had HUD's and the 2000 up SSE all have them. 89-90 Turbo Grand Prix's have the top dash mounted HUD's, 91-96 GP's had Optional HUD's and the 1997-2003 GP GT had Optional HUD while the GTP got them as Standard. most 2004 up Bonnies and GP's have HUD's.

11-15-06, 07:50 AM
Wow! There are a lot of good ideas in the OP's first post. I never though of trading borrowing the tech from some cars for ours. I am loving the HUD idea the most. If you can make progress in terms of wiring and fitting, please, please keep us updated!

11-16-06, 02:27 PM
very cool

11-16-06, 04:09 PM
I wouldn't mind having a HUD in my car. Is it really hard to do as far as wiring? I ain't too good at that stuff.

11-16-06, 10:20 PM
It's really not hard at all wiring-wise. The toughest part is mounting it. (which isn't too bad even)

11-17-06, 08:53 AM
no questions in tech tips forum, read the sticky - urbanski

11-17-06, 02:30 PM
I had a '93 Bonneville SSE that had a HUD that was wire adjustable. Initially I didn't think this option was all that useful, but after a while I got REALLY acclimated to never looking down from the road. You always know exactly how fast you are going...which is real handy if you've had a few and don't want to speed or get pulled over for swerving while you're looking down at the instrument panel.

Some more specifics about how to wire the sucker up/calibrate it would be really useful.

12-15-06, 11:46 AM
There are few of STS on a junkyard near town, I will keep this info in mind next time I'll go


12-21-06, 11:36 PM
Another good swap is upgrading to CSI 144 124/140 amp alternators and I use them on Chevys by simply putting a cresent wrench on the stamped steel alternator upper mount and simply push it up a little and solder in the newer plug. it still reqires one power wire (Ill look for the diagram of the CSI Alt plug an post it as soon as I find it)to jey on just like a SI series and another I loop over to the battery terninal oh and the clocking on CSI alternators is as looking fromt the front not the back and most GM pulleys will interchange and the big thing is watch for spacers under the alt pulley as some pulleys have it made into the pulley.
These have digital regulators and if you have an amps guage in system you will see the needle jump up as your system bumps. I had a 321-411 on my 70 Monte Carlo for 9 years then on my 78 C10 for 2 1/2 yrs and finally it started getting weake(worn brushes I think, Ill just swap it in at AZ for new one soon).
This is simply one of the best mods (CSI alt )reguardless of it being a 130mm or a 144mm case as the 130s are 105 amps andwill work fine.
I havent got to play with the internal fan ones yet but its simply a cleaner look and matching up/making mounting brackets. and if you can find the cooling duct from the older CSI's with the black back cover you can make them pull cool air from a fender or the base of the winshield/cowl area and it helps if you have large stereo systems.
Oh and I even use CSIs on farm tractor conversions, really helps the light brightness too.
Lee Abel

01-22-07, 07:36 PM
Concerning the HUD projects... The best way to know if a particular year /make HUD will work in a Cadillac is to obtain the Factory Service Manuals (FSM) for BOTH CARS. You'll have to research and understand the wiring for the HUD and which wires from your Cadillac you will have to use to make the HUD work.

I have not looked into the mounting possiblities... But I'm sure others on here who have stripped down a caddy interior would have a better idea on where / how to fabricate a mount. ..

Another question a lot of people ask about is will they need an HUD spec windshield to get the HUD to work?.. the answer is NO!!!..

GM, for example in the 90's they started using the SAME windshields for NON-HUD cars and HUD equppied cars!..

YES, the windshields are made on the SAME assembly line. The ONLY difference is that GM workers would test the glass for higher "reflectablity". Higher reflecting windshields got sorted in the "HUD parts bin".... That made the price of the windshield increase by $500 or so bucks.... :-(

So the type of windshield your Caddy uses is the LEAST of your worries if you want to try your hand at adapting an HUD.

01-23-07, 09:17 AM
Hud looks very cool, I dont have any measurements but the hud controls look like they would easily fit in the unused part of the dash in late 80's/ early 90s Devilles under the window locks

If anyone tries this and gets the HUD working please post since I'd be interested aswell.


01-24-07, 01:12 PM
Whoops, forgot about this. Here's the write up I made for the HUD (originally to put it into a CRX, I changed it a bit for here)

First, scour your local junkyards for mid-90s junked Pontiac Bonnevilles. Look for SSE or SSEi models. If you can find a newer style HUD out of a later Bonneville or GP, your lucky. They have motorized mirrors to adjust the image, instead of the cable actuated older style which this write up deals with. (there similar though, and will work sans radio function) Remember, your dealing with a Pontiac interior, so most of the trim panels you simply pull to release the clips. Remove the panel around the HUD and defroster grilles and the panel around the controls for the HUD by the steering wheel. Unscrew the two torx screws holding the controls to the dash, and clip the wires going to the plug, leaving enough room for you to splice into later on. Disconnect the mechanical adjustment cable by pulling it free starting with the base. it will unclip. Next, remove the 4 torx screws holding the HUD unit to the top of the dash. These are angled so you actually can get a screwdriver in there without too much trouble. The HUD will lift out giving you (limited) access to the connector on the front. Cut the wires for this as close to the main harness bundle as you can, giving you more room to work once it's in your car.
Now you will need the appropriate wiring diagram for your instrument cluster. The wires to concetrate on are:

+12v power to gauges
Gauges ground
High beam indicator
Left and Right turn indicators
+12v Gauges Illumination
Gauges Illumination dimming

Now for the connections. I will refer to the pin numbers found on the HUD connector, as wiring colors may have changed for some years/models.
Pin 1- <empty>
Pin 2- Connect to Gray wire on controls, and to +12v Gauges Illumination
Pin 3- Connect to White wire on controls
Pin 4- <when +12v applied, Low Fuel indicator>
Pin 5- Connect to Left Turn signal indicator
Pin 6- <when +12v applied, "Check Gauges" indicator>
Pin 7- Connect to Light Blue wire on controls
Pin 8- Connect to VSS
Pin 9- Connect to High beam indicator
Pin 10- Connect to Right Turn indicator
Pin 11- Connect to Pink/Black wire on controls, and to +12v Gauge power feed
Pin 12- Connect to Black/White wire on controls, and to Gauges ground
(Couldnt find pin markings on control plug, so I'll hope wire colors stayed constant.)
In order, from one end to another...
Pink/Black- +12v Gauges power, and Pin 11 of HUD. (Or any switched +12v that is convenient)
Gray- +12v Gauges illumination, and Pin 2 on HUD
White- Pin 3 on HUD
Black- Gauges Illumination dimming
Black/White- Gauges ground, and Pin 12 on HUD (or any convenient ground)
Light Blue- Pin 7 on HUD



02-11-07, 09:55 PM
Genius. Thumbs up!

I want one.