D4 diode blown in door lock module

["John Elgersma" <delorean@xxxx>]

I have bench tested my door lock module extensively. Everything 
checks out fine but the D4 diode between purple and ground is blown. 
Now, I don't know how long its been that way but here are the details.
First, I decided to replace the solenoids with the two wire actuators 
instead of the 3-wire solenoids. This meant that I switching was 
required between these two wires of the actuators. I installed 2 
relays for each side, one relay dealing with the lock operation and 
another for the unlock operation. So now, I have four extra relays 
for the door locks. At rest, the actuator contacts are at ground 
until a pulse from the door lock module provides power to either wire 
to unlock or lock. This has worked great! The modification was 
documented but somehow I had to remember how it was done. The relays 
in the door lock module only provide 12 volts to the relays which in 
term, provide 12 volts to the actuators so no huge current drain 
necessary for these plastic actuators; my module should last a life-
time. My car is unavailable to check this circuit right now so the 
best I can do is, replace this D4 diode. What value can I replace it 
with as mine is all fried up to a crisp!
John Elgersma 10250