Newbie here, Dead Ins Cluster, Radio, Windows

[mbs xk8]

None of the idiot lights are illuminated when starting the truck other than the blinking airbag light. No CEL, 4x4, Oil, etc. are coming on.

 

[mbs xk8]

Here are the results:

C220b
pin 5 - 12.36
Pin 7 - 12.35

Pin 2 - yes, has continuity
Pin 11 - no continuity (but the wire is orange and light green, not black as stated. )

Next test: AD1 Ck Instr Cluster Power Supply
C220a - pin 18 - 12.32
C220b - pin 1 - 0.00
C220b - pin 7 - 12.31

AD2:
C220a - pin 11 - continuity and meter showed 0.00
C220b - pin 2 - continuity and meter showed 0.00
(I'm not sure hoe to test resistance)

 

[stamp11127]

I'm not by the computer now but there is a power problem on one pin.
What model and brand of meter are you using? I'll try and get a manual online when I get back.
So far this is a good sign concerning the cluster.

 

[mbs xk8]

Sears craftsman digital meter 82082

 

[Bedrck47]

In your reply "Pin 11 - no continuity (but the wire is orange and light green, not black as stated.

Wire is black for pin 11 on C220a but its orange and light green for pin 11 on C220b
I believe you read the wrong connector

but later you read it correctly

 

[stamp11127]

Wonderful Sears, I need the model number on the back of the meter or send me a pic of the front of your meter to my email and I'll tell you how to set the meter for resistance.

Right now we are going to work with the "0" volts reading on C220b pin 1.
Check both sides of fuse 21 - hot at all times. Should have battery voltage on both sides of the fuse.

If you show battery voltage here, double check the C220b connector pin 1 again to verify the "0" volts reading. Wire color s/b black with light green stripe. If it still shows "0" you will need to check connector C270f at the central junction box with it plugged in. I've used straight pins slid into the connector (not the wire) to check.

Ref Diagrams are: 13-5 & 60-2

 

[mbs xk8]

Fuse 21 had 12.35 on the bottom post but 0 on thru top post. I replaced it and now theres power at C220b #1

Fuse 21 looked good but I guess it wasn't

 

[BIG GREEN FORD]

Yea that's why roxy, and stamp always say to check them with a meter not by looking at them.

 

[mbs xk8]

Holy cow, I just reconnected the instrument cluster and the gauges worked and the radio came on. Then I heard a pop. I turned off the car and then back on, and fuse 21 is blown. Shows 12.35 volts on the bottom connector and 8 on the top. I used a fuse that lights up when there's a problem. Its glowing red now.

So I'm guessing I have a short somewhere??

 

[stamp11127]

Yep or an overload on the circuit, check your email.

Now the fun begins....

What do you know about tracing wires? You may have a short to ground, most of those will be in bends of the harness. Need to see the front of your meter since we will be checking continuity / resistance and don't want to apply battery voltage to the meter.

Do you have the diagram for power dist 13-5?

 

[mbs xk8]

Ive worked with Lucas electronics on my 75 MG Midget. Lol

 

[mbs xk8]

Emailed pix of the meter

 

[stamp11127]

Let me know if you need the diagram.

We will be working on circuit 3049 - you have a choice at this point. Visually inspect the harness for a short to ground or start disconnection connectors to isolate the circuit from the rest of the vehicle. I'd start with the visual inspection - you might get lucky. The isolation step is usually time consuming.

 

[mbs xk8]

Visual inspection it is!

 

[mbs xk8]

Is the diagram in the a.PDF file you sent?

 

[stamp11127]

Black lead should always be in the center unless reading amps/current.
The resistance settings are the green section and in measures in ohms.
Red lead will always be in the red socket.

Never measure resistance on a circuit that has power applied. Disconnect power by whatever means is practical - unplug the battery or connector etc.
Set meter to the range of resistance you want to measure. In this case for the ground test it would be the 220 range. Touch the red and black leads together and they will zero out, then read the circuit. Red will be on the pin and black will be to ground.

If you have not disconnected power you will blow the meter and in extreme cases it can catch on fire or explode. The explode part will happen in high voltage readings.

Don't remember what I've sent you. I suffer from CRS.

 

[mbs xk8]

I don't have anything with C3049.
I'll make changes to the meter

 

[stamp11127]

The next test to perform is a "redneck" test and may pop a fuse. You'll need to use a circuit breaker or a 15amp fuse - turn ign to off, replace fuse F21 and disconnect the cluster. Turn ign to run, if fuse doesn't pop move the portion of harness to the connector C220b around and see if it pops. If it doesn't, turn ign to off, reconnect the C220b connector to the cluster and turn ign to run. If the fuse pops you have a problem in the cluster or a branch circuit after the cluster.

If the fuse pops with the cluster disconnected it is in a branch of the circuit prior to the cluster.

The circuit number is 3049 - see attached pdf.

They have wired this circuit to the interior lamp relay, make sure that all interior lamps, vanity - cargo - puddle lamps - map etc are turned off.

 

[mbs xk8]

Replaced fuse with new one, ignition off, removed connector to C220b , turned on and twisted wires and connector. The fuse wasn't affected

Reconnected C220b ,and turned on. Everything worked great: gauges, lights, radio, and dome lights.

When I started car, everything stayed on, but when I turned off and removed the key, Fuse 22 blew. I heard it pop.

Ignition wires?? how can we test these?

 

[stamp11127]

Fuse 22 is radio door locks and pwr windows. Does it have the oem radio?