- Thread starter
- #161
So what's the next thing to do now?
Got stranded at Wally World
- Thread starter WhompinFJ
- Start date
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Let's try and rule out the 3 interior light switches.
Keep both battery cables disconnected from their battery posts.
Remove the jumper wire from the end of the pos battery cable.
Reinstall the Cig fuse.
Remove the Dome fuse.
Keep the DIMM set to measure Continuity.
Attach one probe from the DIMM to the PS of the empty Dome fuse slot (the one that read 0V).
Attach the jumper cable to end of the other DIMM probe...the business end of the 'jumper' cable is now again the probe tip.
Set the Dome light switch above the DS head to the middle position- OFF (the bulb can remain installed).
Touch to 'jumper' probe tip at point A and listen for a beep.
Move the 'jumper' probe tip to point B and listen for a beep.
Move the 'jumper' tip to point C and listen for a beep.
Keep both battery cables disconnected from their battery posts.
Remove the jumper wire from the end of the pos battery cable.
Reinstall the Cig fuse.
Remove the Dome fuse.
Keep the DIMM set to measure Continuity.
Attach one probe from the DIMM to the PS of the empty Dome fuse slot (the one that read 0V).
Attach the jumper cable to end of the other DIMM probe...the business end of the 'jumper' cable is now again the probe tip.
Set the Dome light switch above the DS head to the middle position- OFF (the bulb can remain installed).
Touch to 'jumper' probe tip at point A and listen for a beep.
Move the 'jumper' probe tip to point B and listen for a beep.
Move the 'jumper' tip to point C and listen for a beep.
- Thread starter
- #164
I touch it at the metal prongs where the bulb goes right?
On the A side, yes that is good enough.
But for B and C, there should be metal tabs that the switch lever slides over. With the switch lever in the middle "OFF" position, can you see the metal contact pads for B and C on either side?
But for B and C, there should be metal tabs that the switch lever slides over. With the switch lever in the middle "OFF" position, can you see the metal contact pads for B and C on either side?
and keep the bulb installed when you are testing all three A, B and C...
- Thread starter
- #167
I can see what your saying, when I touch it to a nothing happens, no beep and no reading.
Huh. If you touch the 'jumper' probe tip to the other probe tip that is connected to the PS empty fuse slot it should beep...confirming that the DIMM is set up properly and working properly. If it beeps when you run that confirmation test, then go back and try point A again and see if it beeps.
- Thread starter
- #170
- Thread starter
- #171
So I turned my meter off and back on and it beeps on all but B
- Thread starter
- #172
No worries. In that picture, it looks like you've got that 'tool' connected to the DS (the one that measured 12V on the very first test today)...for this test, it needs to be connected to the PS (the right side looking at it in the picture)...
And...just to double check, that is the empty Dome fuse slot, right? For this test we want to use the Dome fuse slot, not the Cig fuse slot...
This is with the the DIMM connected to the PS (right) of the empty Dome fuse slot AND the Dome switch at the headliner in the middle "OFF" position?
Beautiful. You get bonus points for being able to adapt in the face of uncertainty...that is a very useful trait to have...!
- Thread starter
- #176
Yes sir! Connected to the right and switch in the middle. I think earlier I may have made a mistake with the dome fuse, which side is 12v and which side is zero.
We'd better go back and rerun that test to make sure we know which is which...because the validity of all these other tests we are running depend on know which side is getting power from the battery and which side is connected to all the circuits we are testing behind it...
You'll need to reset the DIMM to test for 20V DC:
plug the Black DIMM (Digital Multi Meter) lead into the common ground port on the DIMM
plug the Red DIMM lead into the "V Ω mA μA" port on the DIMM
Turn the dial on the DIMM to measure 20V DC (not AC)...here's the symbols for how you will tell V DC from V AC:
Once you have the DIMM set up properly, to run the test you will have to:
Have the battery cables attached to their proper battery terminals (don't have to tighten them all the way down, just make sure they are making good contact)
Remove the Dome and Cig fuses from the fuse box (remember which goes in which slot...or just do one at a time so you don't have to remember).
Ground the Black DIMM probe to a big hunk of metal...like the door jam...it is better if it bare metal, not painted, but if it is painted, you can just push through a little with the sharp tip of the probe so that it makes good contact.
Then, with the Red probe touch the DS contact in the empty fuse slot where the fuse used to be.
Write down whether it reads 12V or 0V
Then, move the Red probe to the PS contact in the same empty fuse slot...while keeping the Black probe touching ground.
Write down whether it reads 12V or 0V.
Do this for both the Dome and Cig fuse slots and post up which side (for each) reads 12V and which side reads 0V.
- Thread starter
- #178
Just checked again, dome light is hot on the left and nothing on the right. And the cig is the same
OK. that is the same as you did the first time...so then all these tests make sense (or they are supposed to make sense)...
- Thread starter
- #180
Haha. Yeah, so next plan of action to do?
