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Test Probes and On/Off switches
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Bluescout Offline
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Post: #1
Test Probes and On/Off switches
I am thinking of doing an upgrade to the two ER EFIEs that I have in my vehicle by mounting them in a project box and wiring in 4 test probe inlets and an On/Off switch .

Just wanted to know what they are specifically called so I buy the right ones . I have no electronic training , but I can do some basic soldering , etc...

Is it just a matter of splicing in the green and white wires to and from the test inlets , not sure how to wire in the On/Off switches .

Any help would be appreciated ,


Doug
11-23-2008 08:13 AM
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mike Offline
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RE: Test Probes and On/Off switches
Hi Doug,

I answered an email about this, but I'll post it here too for all to see:

The test ports I used on my Deluxe EFIEs are:

Allied Electronics part numbers:
528-0175
528-0176

One is red and the other black. But you can also get them in white and green too. I connect the red test port to the computer (EFIE white wire), and the black test port to the sensor (EFIE green wire). That way when you put the same color probes into the ports, you see a positive voltage. But it makes just as much sense to use white and green test ports too.

As to the switch: you'll need a double pole, double throw switch (DPDT). One pole makes/breaks power to the EFIE and so is inserted into the red power wire to the EFIE. The other pole shorts the white wire to the green wire when the power is in the off position. This is so the EFIE will be switched out of circuit when the power is off, and the sensor is then reconnected to the computer directly.

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11-24-2008 08:56 AM
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Bluescout Offline
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RE: Test Probes and On/Off switches
Thanks Mike , I really appreciate it Wink
11-24-2008 04:08 PM
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Gary Offline
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RE: Test Probes and On/Off switches
If you're in a hurry and can find a RadShak, I think they have a similar port.
11-24-2008 04:19 PM
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Bluescout Offline
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RE: Test Probes and On/Off switches
Gary Wrote:If you're in a hurry and can find a RadShak, I think they have a similar port.


Thx Garry , I live in a small town in central Canada , there is a Radio Shack in town 5 mins away , actually , everything is 5 mins away in this town Big Grin

Now that I know what they are called , I will check it out , thanks again .

Doug
11-24-2008 07:09 PM
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Gary Offline
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RE: Test Probes and On/Off switches
No, that was just my word. They're proabably called something more like test junctions or probe terminals or something like that.
11-24-2008 07:29 PM
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