cruise control amplifier or module?
01-04-2010, 09:15 PM
#1
Thread Starter
Join Date: Aug 2009
Location: Texas
Posts: 38
cruise control amplifier or module?
I am working on getting my cruise control working on my 90 LX 5.0 5 speed. First the switches on the steering wheel were defective, so I found a set on ebay, installed them, they work. Now, I have discovered that the amplifier does not work either. I have not been able to find an amplifier for the cruise, but on ebay there is listed a cruise control electronic module for 79-93 Mustangs for $8.00 with $3 shipping. Is the electronic module the same as the amplifier, and will it be good for my 90 lx?
Thanks for your expert experience with this. I am a novice.
Sigmund
Thanks for your expert experience with this. I am a novice.
Sigmund
01-05-2010, 12:37 PM
#3
The Rogue Mod
Join Date: Feb 2006
Location: Maryland Sucka's!!
Posts: 21,918
The servo is Attached To LH Door Pillar Under Fender. make sure you have a good vacuum source running to it also.
Here's an ohms test for the servo
1. Separate the eight pin connector from the amplifier.
2. Connect an ohmmeter between the orange/yellow (circuit 144) and the grey/black (circuit 145) leads at the eight pin connector, refer to SCHEMATIC DIAGRAMS/ELECTRICAL AND ELECTRONIC DIAGRAMS. Resistance should measure 40-75 ohms.
3. Connect an ohmmeter between the orange/yellow (circuit 144) and the white/pink (circuit 146) leads at the connector. Resistance should measure 100-150 ohms.
4. Connect an ohmmeter between the purple/light blue (circuit 147) and Yellow/Red (circuit 148) leads. Resistance should measure 20,000--30,000 ohms.
5. Connect an ohmmeter between the purple/light blue (circuit 147) and brown/light green (circuit 149) leads. Resistance should measure 40,000--60,000 ohms.
6. If proper resistance is not obtained check the wiring and servo separately for damage and replace or service as required.
Location of the cruise module
module testing
Use only a voltmeter of 5000 ohm/volt rating or higher when performing the following amplifier test. Use of a test lamp may damage amplifier due to excess current draw.
``On'' Circuit Test
1. Turn ignition switch to the On position.
2. Connect a voltmeter between white/purple (circuit 296) and ground in the amplifier six pin connector at the amplifier. Battery voltage should be measured.
3. If battery voltage is not measured, check fuse voltage. Repair as necessary.
4. Connect a voltmeter to light blue/black (circuit 151) and ground at the amplifier. Voltmeter should read battery voltage when speed control switch is in the On position, depressed and held. If voltage is not measured, refer to CONTROL SWITCH TEST.
5. Release On button. Voltmeter should read approximately 7.8 volts, indicating the On circuit is engaged. If voltmeter reads zero, check ground and amplifier (either black wire on amplifier six pin connector). If there is no ground on the amplifier, check system ground wiring and connections. Also check the number 6, 20 amp fuse and circuit breaker.
6. If voltmeter still reads zero, substitute, but do not install a know good amplifier, then check for proper On circuit operation.
Brake Circuit Test
1. Connect an ohmmeter between red/light green wire on the six pin connector and ground.
2. Resistance should measure less than 5 ohms.
3. If resistance is greater than 5 ohms, check for burned out stop lamps, improper wiring, or clutch malfunction.
Horn Relay Test (Escort, Tempo, Tracer & Topaz)
1. Connect a voltmeter between yellow/light blue dot wire of relay and ground.
2. Voltmeter should indicate battery voltage.
3. If voltmeter does not indicate battery voltage, check for voltage at supply lead. The supply lead is light blue with a white stripe on Escort and Tracer, or dark blue on Tempo and Topaz.
4. If voltage is indicated at supply lead, replace the relay.
5. If no voltage is indicated at supply lead, check fuse and wiring for an open or short and repair or replace as necessary.
Off Circuit Test
1. Turn ignition switch to the Run position.
2. Connect a voltmeter to the light blue/black wire (circuit 151), depress Off switch on steering wheel, then read voltage.
3. Voltage should drop to zero indicating On circuit is de-energized.
4. If voltage does not drop to zero, perform CONTROL SWITCH TEST.
5. If switches are checked and found to be good, substitute a known good amplifier, then repeat procedure.
Set-Accelerate Circuit Test
1. Turn ignition switch to the On position.
2. Connect a voltmeter between the light blue/black wire (circuit 151) in the six pin connector and ground.
3. Depress and hold Set-Acc button on steering wheel. The voltmeter should read approximately 4.5 volts.
4. Rotate steering wheel and watch the voltmeter for fluctuations. If voltage varies more than 0.5 volts, perform CONTROL SWITCH TEST.
Coast Circuit Test
1. Turn ignition switch to the On position.
2. Connect a voltmeter between light blue/black wire (circuit 151) and ground.
3. Depress and hold Coast button on steering wheel. The voltmeter should read approximately 1.5 volts.
Resume Circuit Test
1. Turn ignition switch to the On position.
2. Connect a voltmeter between light blue/black wire (circuit 151) and ground.
3. Depress and hold Resume button on steering wheel. The voltmeter should read approximately 6.5 volts.
4. If all circuits are satisfactory, perform the SERVO ASSEMBLY TEST. substituting a known good amplifier. Do not substitute a known good amplifier until the servo assembly test has been successfully completed.
Diagrams
Hope this helps
Here's an ohms test for the servo
1. Separate the eight pin connector from the amplifier.
2. Connect an ohmmeter between the orange/yellow (circuit 144) and the grey/black (circuit 145) leads at the eight pin connector, refer to SCHEMATIC DIAGRAMS/ELECTRICAL AND ELECTRONIC DIAGRAMS. Resistance should measure 40-75 ohms.
3. Connect an ohmmeter between the orange/yellow (circuit 144) and the white/pink (circuit 146) leads at the connector. Resistance should measure 100-150 ohms.
4. Connect an ohmmeter between the purple/light blue (circuit 147) and Yellow/Red (circuit 148) leads. Resistance should measure 20,000--30,000 ohms.
5. Connect an ohmmeter between the purple/light blue (circuit 147) and brown/light green (circuit 149) leads. Resistance should measure 40,000--60,000 ohms.
6. If proper resistance is not obtained check the wiring and servo separately for damage and replace or service as required.
Location of the cruise module
module testing
Use only a voltmeter of 5000 ohm/volt rating or higher when performing the following amplifier test. Use of a test lamp may damage amplifier due to excess current draw.
``On'' Circuit Test
1. Turn ignition switch to the On position.
2. Connect a voltmeter between white/purple (circuit 296) and ground in the amplifier six pin connector at the amplifier. Battery voltage should be measured.
3. If battery voltage is not measured, check fuse voltage. Repair as necessary.
4. Connect a voltmeter to light blue/black (circuit 151) and ground at the amplifier. Voltmeter should read battery voltage when speed control switch is in the On position, depressed and held. If voltage is not measured, refer to CONTROL SWITCH TEST.
5. Release On button. Voltmeter should read approximately 7.8 volts, indicating the On circuit is engaged. If voltmeter reads zero, check ground and amplifier (either black wire on amplifier six pin connector). If there is no ground on the amplifier, check system ground wiring and connections. Also check the number 6, 20 amp fuse and circuit breaker.
6. If voltmeter still reads zero, substitute, but do not install a know good amplifier, then check for proper On circuit operation.
Brake Circuit Test
1. Connect an ohmmeter between red/light green wire on the six pin connector and ground.
2. Resistance should measure less than 5 ohms.
3. If resistance is greater than 5 ohms, check for burned out stop lamps, improper wiring, or clutch malfunction.
Horn Relay Test (Escort, Tempo, Tracer & Topaz)
1. Connect a voltmeter between yellow/light blue dot wire of relay and ground.
2. Voltmeter should indicate battery voltage.
3. If voltmeter does not indicate battery voltage, check for voltage at supply lead. The supply lead is light blue with a white stripe on Escort and Tracer, or dark blue on Tempo and Topaz.
4. If voltage is indicated at supply lead, replace the relay.
5. If no voltage is indicated at supply lead, check fuse and wiring for an open or short and repair or replace as necessary.
Off Circuit Test
1. Turn ignition switch to the Run position.
2. Connect a voltmeter to the light blue/black wire (circuit 151), depress Off switch on steering wheel, then read voltage.
3. Voltage should drop to zero indicating On circuit is de-energized.
4. If voltage does not drop to zero, perform CONTROL SWITCH TEST.
5. If switches are checked and found to be good, substitute a known good amplifier, then repeat procedure.
Set-Accelerate Circuit Test
1. Turn ignition switch to the On position.
2. Connect a voltmeter between the light blue/black wire (circuit 151) in the six pin connector and ground.
3. Depress and hold Set-Acc button on steering wheel. The voltmeter should read approximately 4.5 volts.
4. Rotate steering wheel and watch the voltmeter for fluctuations. If voltage varies more than 0.5 volts, perform CONTROL SWITCH TEST.
Coast Circuit Test
1. Turn ignition switch to the On position.
2. Connect a voltmeter between light blue/black wire (circuit 151) and ground.
3. Depress and hold Coast button on steering wheel. The voltmeter should read approximately 1.5 volts.
Resume Circuit Test
1. Turn ignition switch to the On position.
2. Connect a voltmeter between light blue/black wire (circuit 151) and ground.
3. Depress and hold Resume button on steering wheel. The voltmeter should read approximately 6.5 volts.
4. If all circuits are satisfactory, perform the SERVO ASSEMBLY TEST. substituting a known good amplifier. Do not substitute a known good amplifier until the servo assembly test has been successfully completed.
Diagrams
Hope this helps
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