Mechanics

SPEDO & TAC. HAND ILLUMATION PROBLEM

1993 Lexus ES 300

Electrical problem
1993 Lexus ES 300 6 cyl Front Wheel Drive Automatic 186000 miles

all of the dash lights are working except the spedo &
and the tack hands. What can I look for? Bought a used inst. Cluster and still had the same problem.
any suggestion?
thanks roy
Avatar
Roy harrington
February 1, 2009.




Hello .. thanks for the donation .. much appreciated

Try this couple of test's and let me know your results .. #1 speed sensor on ES300 is located on the rear of instrument cluster .. let me know

Vehicle Speed Sensors (VSS)
No. 1....In speedometer assembly. See Fig. 3 .
No. 2....On right side of transaxle housing


http://www.2carpros.com/forum/automotive_pictures/266999_vss_4.jpg


Vehicle Speed Signal
Vehicle speed signal is delivered to ECT ECU by No. 1 and 2 speed sensors. The No. 1 speed sensor is driven by differential and indicates actual vehicle speed. The No. 2 speed sensor monitors (magnetic pulse signal) the drive pinion speed.


http://www.2carpros.com/forum/automotive_pictures/266999_vss2_2.jpg


NO. 1 VEHICLE SPEED SENSOR (VSS) TEST
Disconnect electrical connector from No. 1 VSS, located on top of transmission. See Fig. 1. Connect positive battery lead to terminal No. 1 and negative lead to terminal No. 2. Connect positive lead of voltmeter to terminal No. 3 and negative lead to terminal No. 2. See Fig. 21.
Raise and support one vehicle front wheel. Rotate wheel and monitor voltmeter. Ensure voltage changes from zero to 11 volts. Voltage should change 20 times (1993 Camry) or 4 times (1993 ES300) per each revolution of speedometer cable shaft. Replace speed sensor if voltage dose not change as specified.
Fig. 21: Checking No. 1 Vehicle Speed Sensor (VSS)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.


http://www.2carpros.com/forum/automotive_pictures/266999_vss3_1.jpg


NO. 2 VEHICLE SPEED SENSOR (VSS) TEST
Disconnect electrical connector from No. 2 VSS, located on transmission. Raise and support vehicle so front wheels can rotate. Connect ohmmeter between terminals of No. 2 VSS.
Rotate front wheel. Note that ohmmeter needle fluctuates from continuity to no continuity. If reading does not fluctuate correctly, remove No. 2 VSS from transmission.
Connect ohmmeter between terminals of No. 2 VSS. Note that ohmmeter needle fluctuates from continuity to no continuity when magnet is brought close to sensor and then moved away.
Replace speed sensor if reading does not fluctuate. If reading fluctuates correctly, components in transmission for VSS must be replaced.

Dave H
Feb 3, 2009.
I'm sorry that I didn't make my question clear.
All of the dash lights light up except for the two hands, spedo and the tac.
I replace the cluster with a used one but had the same problem.
What is your suggestion?

Mrtoad@cis. Net

Tiny
Roy harrington
Feb 3, 2009.
So the 2 you are mentioned are not lighting up. I can only find one hot feed to the instrument cluster light's. So they should all be working. Have you checked the bulbs have not blown !
AD

Dave H
Feb 3, 2009.
1993 300es lexus
spedo and tac work
just can't read the hands at night
bulbs are all good
took each bulb out and shown a light into socket and could see on the front where each light lite up but not the hands for the spedo or tack
hands need to glow but do not.
You may not have run into this problem before?
Roy
mrtoad@cis. Net

Tiny
Roy harrington
Feb 4, 2009.

AD