Looking for a wiring diagram for 99 Deville

[dakid6945]

Looking for a wiring diagram for my 1999 Cadillac Deville. Need to find which wire is the speed sensor. Installing navigation in my car and I dont know which wire is the speed sensor. Any and all help would be greatly appreciated.

[dirt_cheap_fleetwood]

Why do you need a speed sensor wire for Nav? What is wrong with a good 'ol TomTom suction cupped to the dash?

I sincerely hope you are not planning on replacing the factory head unit with an aftermarket one or that you plan on splicing into ANY sensor wires. You have no idea the shit storm that will be released upon you. These cars are very intertwined electrically, removing the factory radio will screw up more systems than you can imagine. Even worse is cutting or tapping into a sensor wire, where altering the signal by only a few millivolts can confuse the hell out of the computer and make the car run like crap or not run at all. They are so sensitive that you cannot even solder a wire together if it breaks because the solder causes excessive resistance, the entire wire must be replaced.

[submariner409]

Unless you know exactly what you are doing and have the proper jumpers and harnesses, you're gonna open a Pandora's Box that will never close.

[dakid6945]

i have already replaced my factory hu and alarm system. both have been in my deville since june without any issues. i appreciate the warnings as well. with that being said, can anyone advise of the color and location of the speed sensor wire?

[dirt_cheap_fleetwood]

It still begs the question, why do you need the speed sensor wire for a nav unit? It has GPS, it should already know how fast you are going. I will look up the info you need at school tomorrow.

[dakid6945]

"By using a high sensitivity 12-channel GPS receiver, an on-board gyroscope and connecting to the vehicle’s speed sense circuit, the NAX980HD to functions just like a factory installed navigation system. It knows where you are, which way you are going, and actually learns your driving habits to get you where you want to go like no other system."

http://clarion.com/us/en/products/20...408777755.html

This is why I need the wire and location. I was told that it was a dark green and white wire located in the instrument cluster. Looking to verify if this is correct.

[dakid6945]

Thank you in advance for your warnings, advice, and help!!!!

[Dave S Texas]

FWIW.....A Factory Service Manual has all the info you will ever need when working on your DeVille. Look at ebay item #250521101023. Best tool you can have at your disposal.

[Eric]

FSM shows Vehicle Speed Signal is DK GRN/WHT wire in Pin K of Cruise Control Connector which is located at the left rear of the engine compartment, on the left strut tower.

[Mark C]

Its also a darkgreen/white wire on pin B5 of the C1 Instrument Panel Connector, circuit 817. Its a 24 pin connector looking at the connector from the mating end the A terminals are closest to the side of the connector with the latch on it, B's are on the side furthest from the latch, the 1 terminalss (A1/B1) are to the left side, and the 12s (A12/B12). The instrument cluster has 2 24 pin connectors (C1 and C2) and one 64 pin connector (C3) on the top rear of the cluster. C1 is the one with the orange power wire in the A1 position (latch side left end) C2 (not the one you want) has a light blue wire in that location.

The dark green/white wire runs from C1 B5 to C205 terminal P(Body harness to the engine harness, under the right side of the IP, near the IP compartment) then out into the engine compartment thru penetration P100 (On the right rear of the engine compartment, near the strut tower) to connector C2 pin 25 on the PCM. The cruise control feed taps off pin P in C205 goes thru penetration P100 over to terminal K on the cruise control module in the engine compartment, and also to connector C2 terminal C6 on the CVRSS module inside the car(if you have one).