04 Navi No Start-No Crank No PWR to OBD

[stamp11127]

Does your meter have a continuity setting? If you don't know, which make/model is it?

 

[stamp11127]

Current Issues:

No Crank No Start - key in start position causes click in trailer-tow relay.

No communication to PCM from OBD2.

No power to fuel pump unless relay bypassed.

Gear selector won’t release when key on/brake pressed.

Instrument cluster will not illuminate.

Turn signals not working - flashers DO work.

HVAC panel has no power.

Which one do you want to work on next? I'll need the wiring diagrams for what you choose.

 

[03NavigatorGuy]

I am using this one at the moment!

 

[stamp11127]

Continuity setting is the first yellow one to the right of 200 ohms resistance.

Be careful with that meter "10A max unfused" means it burns/explodes if overloaded.

 

[03NavigatorGuy]

Continuity setting is the first yellow one to the right of 200 ohms resistance.

Be careful with that meter "10A max unfused" means it burns/explodes if overloaded.

Yes, Thanks, I lent my good one to my brother, haven't gotten it back yet!

I will now let the dumb questions begin!

In checking the continuity of the of the ignition switch, am I to test from the switch to the CJB or where?

 

[stamp11127]

Switch disconnected. Testing input/output at the switch:
pin 4 to 7 in start
pin 4 to 6 in accessory and run
pin 4 to 1 in run and start

Each test should tone when the circuit path is good. Any that fails means a bad switch.

 

[03NavigatorGuy]

Switch disconnected. Testing input/output at the switch:
pin 4 to 7 in start
pin 4 to 6 in accessory and run
pin 4 to 1 in run and start

Each test should tone when the circuit path is good. Any that fails means a bad switch.

They all appear to have power as required.

 

[stamp11127]

Then you don't need another ignition switch. They are not supposed to have power during the test, just continuity.

The continuity test is a resistance test, under a specific threshold of resistance you will get a tone from your meter. Above the threshold you will get no tone but a measurement of resistance. This test requires the circuit being tested to be unpowered - the meter provides the power. Try running a continuity test on a high voltage circuit with power present is a recipe for disaster.

You can add a replacement wire from pin 7 at the ignition switch plug to pin 11 of the cjb plug. Cut the wire about 4-5 inches from each plug, solder and heat shrink wrap the splice. When you run the wire avoid any metal contact and zip tie in place once the connections are complete.

 

[riphip]

Where in Memphis are you? I'm on west edge of Gtown.

 

[03NavigatorGuy]

Where in Memphis are you? I'm on west edge of Gtown.

I am on the East edge!