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1988 Ford Ranger XLT 4x4 2.9L , throttle senor resistance 1.0 at Idle Full throttle is 5.0 resistance, HOW do you measure the resistance?

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  • Ford Master
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You will need a ohm meter with resistance setting, there are three wires that go to the tps sensor, one is ground the other is five volts and the last is the signal wire, use the meter to locate the 5volt wire and then the ground wire and the last will be the signal wire, thats the wire to use, it sounds like you have done this already but at idle 1.0 is good and 4.99 to 5.0 is good at full throtle. what you do is check the throtle slowly and check for dead spots as you move the gas pedal, the problem is that the dead spot may be so fast you wont see it, a lab scope would be the ideal tool to use but try the meter, im not sure what your problem is but this is how to test the tps.

Posted on Mar 27, 2011

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TEST B: BATTERY VOLTAGE OUT OF RANGE - DTC B1676
1. Check if vehicle has been jump started within past 2 weeks. If vehicle has been jump started, ABS is
okay. If vehicle has not been jump started, go to next step.
2. Using DVOM, measure voltage between positive and negative battery terminals. If voltage is 9-19 volts,
go to next step. If voltage is not 9-19 volts, diagnose charging system. See appropriate GENERATORS
article in STARTING & CHARGING SYSTEMS.
3. Turn ignition off. Disconnect 25-pin ABS control module. Install EEC-IV 60-pin Breakout Box (014-
00322). Turn ignition on. Measure voltage between breakout box terminal No. 20 and ground. If voltage
is more than 10 volts, go to next step. If voltage is less than 10 volts, repair Light Blue/Pink wire between
ABS control module and instrument panel fuse panel.
4. Turn ignition off. Measure voltage between breakout box terminal No. 25 and ground. If voltage is
greater than 10 volts, go to next step. If voltage is less than 10 volts, repair Red wire between ABS
control module and power distribution box/engine compartment fuse box.
5. Measure voltage between breakout box terminal No. 9 and ground. If voltage is greater than 10 volts, go
to next step. If voltage is less than 10 volts, repair Yellow/Light Green wire between ABS control module
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6. Measure resistance between breakout box terminal No. 8 and ground. Also, measure resistance between
breakout box terminal No. 24 and ground. If both resistance measurements are less than 5 ohms, replace
ABS control module and repeat self-test. If either resistance measurement is greater than 5 ohms, repair
suspect Black wire between ABS control module and ground distribution.
NOTE: DTC B1676 will set if vehicle has been jump started.
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