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Electrical system concerns that are due to diode failure may be serviced with an approved Ford service diode. Some electrical diodes used in early production vehicles are color coded for the purpose of size identification while others are stamped with a manufacture number. All Ford service diodes and current production diodes are identified by manufacture number.
ACTION If service is required, refer to the appropriate model/year Electrical and Vacuum Troubleshooting Manual (EVTM) to determine the size and location of the diode(s). Refer to the following Electrical Diode Application Chart for the correct service part number.
Electrical Diode Application Chart
PRODUCTION IDENTIFICATION
Old Design Current Design Service Part Identification
1.0 Amp-200V
(color gray) 1.0 Amp-200V
(stamped
1N4003)
1.0 Amp-400V E8DZ-10C912-A
(stamped 1N4004)
1.0 Amp-50V
(color black) 1.0 Amp-400V
(stamped 1N4004) 1.0 Amp-400V E8DZ-10C912-A
(stamped
1N4004)
3.0 Amp-50V
(color orange) 6.0 Amp-400V
(stamped MR754) 6.0 Amp-400V E8DZ-10C912-B
(stamped
MR754)
6.0 Amp-400V
(color blue) 6.0 Amp-400V
(stamped MR754) 6.0 Amp-400V E8DZ-10C912-B
(stamped MR754)
PART NUMBER PART NAME
E8DZ-10C912-A Diode - 1.0 Amp - 400V
E8DZ-10C912-B Diode - 6.0 Amp - 400V
These diodes were used as late as 97 in almost All Ford cars & trucks
Probably in later years too
Check NAPA
Radio Shack
for example
for da 1 amp diode
search for 1N4005
Here is Philips Data Sheet forthe 1N4005
http://www.fordpartsgiant.com/parts/ford-diode-asy_e8dz-10c912-a.html
some charge Outrageous
[email protected] $25.56