ECON and PWR light troubleshooting

[banpei]

I just took apart the EUDM cluster and found that the ECON and PWR lights are operated by a separate board (called the Econodrive Monitor) attached to the rear of the cluster:

I didn't realize the lights are a little bit more "advanced" than just two bulbs on the cluster. It could be the case your board doesn't function properly or you have a loose contact.

This is the board seen from the other side:


You can test the board without removing it. If you put 12 volts on the E and IG+ terminals (- on E and + on the IG+ terminals) the ECON light should light up. If you then bridge the E terminal and the SW terminal the PWR light should light up. If the board doesn't function fine, check the diodes and the C1213 transistor on the board. Maybe one of them fails in resistance and it will not block the current anymore.

If the board functions fine, you should check the continuity between the switch and pin 13 of your gauge cluster. You can find the pin below, or just follow the SW wire down to the floppy circuit mat and then follow that trace to the connector.

If the continuity is fine, check if the switch works as described above.