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test relays that are drived with a uln4803lw

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maryamrez

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I have a board and I want to test it with JTAG. a part of it is relay. there are 8 relays that are drived with ULN2803LW. I have Autocoupler in board too. so I want to turn on Relays and connect them to Autocoupler and read output from autocouplers and understand that Realay work properly or not but I can not force relay to stay on. I have a XJTAG device . do you have any idea for me to how make relays stay on?
 
This would go better if you provide a circuit of the test setup.

Ron
 
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