Computer Replacement Under TSB

Hi Beth,

I assume that you have a good digital multimeter available. Find the relay/fuse box near the inverter. Remove the cover and locate the circuit opening relay by referring to the map on the inside of the cover. Pry out the relay gently, using a small flat-blade screwdriver.

You will see four terminals on the bottom of the relay, two are silver colored and two are copper colored. Use the ohmmeter function on the multimeter to see which terminal pair is for the coil, you will measure a resistance like 10 ohms or so. You should measure infinite resistance on the other pair of terminals which is switched.

Now, apply 12VDC to the coil terminals. The relay will snap shut so that the switched pair of terminals now has continuity.

Measure resistance on the switched pair of terminals. Instead of infinite resistance you should now see a value very close to zero. The closer to zero, the better the relay is. If the resistance is greater than 0.5 ohm (after taking into account the resistance of the multimeter leads) then I suggest you replace the relay.

 

Great instructions, but one last thing--how does one apply 12VDC to the coil terminals? Turn on the ignition? I will try this soon. No codes found by Autozone either! Thanks.

 

I have a couple of laboratory power supplies that can be used for this purpose. You could run a couple of jumper wires to the 12V battery in the back of the car. However this might pose a safety hazard if you short the wires together.

You could buy a couple of 6V lantern batteries and wire them in series to use as a small power supply.