how to test f150 rectifier

[Redhunter]

Is there a way to test the rectifier with just a Ohm meter and or the whole charging system?


05 f150TLRD

[99yam40]

yes and no, the service manual gives procedures and specs for measuring the peak voltage output of lighting coils and the rectifier to see where the problem is, if there is one

[Redhunter]

yes and no, the service manual gives procedures and specs for measuring the peak voltage output of lighting coils and the rectifier to see where the problem is, if there is one

Is the only way is with the test Plug mention in the Manual?

[99yam40]

With the plug undone ( unloaded) you just hook into the open wires, but with the loaded connectors( hooked up) you can back probe the connectors where the wires run into them with a small paper clip or pin making sure you do not hurt the wire insulation and hook a alligator clip to them for you meter to get the reading.

But you really need the proper meter or a DVA adapter to be able to compare to minimum specs in manual.

[Redhunter]

How about the Lighting Coil itself, can it be tested ??

[Redhunter]

Ok, now is there a way to test the Lighting Coil ?

[boscoe99]

Yes.

If the R/R does not have the correct output then test the lighting coil. If the coil does not have the correct output then it will need to be removed and replaced.

[Redhunter]

Yes.

If the R/R does not have the correct output then test the lighting coil. If the coil does not have the correct output then it will need to be removed and replaced.

What is the Proper procedure to test the Coil.... Other then with the Yamaha test cable ? If Any

[boscoe99]

Just check the three green wires coming from the lighting coil. Green to green, green to green and green to green.

It is all in the service manual. You do have a service manual don't you?

[Redhunter]

Yes I do! But it talks about using a test Harness "THAT " is what I don't Have, and my Question Was if I could test with Out it. I am Sorry for Any Miss understanding On My Part.

[boscoe99]

Yes, you can test without it. Just be damn careful connecting the multimeter leads to the green wires with the engine running at 1500 and 3500 RPM. That flywheel can do some serious damage.

I forget if the lighting coil connector has pins or sockets. You just have to be able to make contact with the pin or socket with the multimeter test lead while the motor is running.

[Redhunter]

Just check the three green wires coming from the lighting coil. Green to green, green to green and green to green.

It is all in the service manual. You do have a service manual don't you?

These reading should be DC not AC correct ? Reason being I get these reading on my Volt Meter on AC

[boscoe99]

Voltage created is AC.

However, the meter is to be set on the DC scale when the peak voltage adapter is being used.

[Redhunter]

Voltage created is AC.

However, the meter is to be set on the DC scale when the peak voltage adapter is being used.

Ok so my coil is good... Only getting 8.2 Volts out of the R/R so that should be my Problem

Once more Mr.Boscoe99 thanks for All your Help

[boscoe99]

Volts out of the R/R are DC and would be checked without a peak voltage adapter being used. Scale is set to DC.