Ford Repair: 1995 e150 abs and airbag lights, airbag deployment, airbag module

Question
i have two problems. my e150 abs light comes on intermittently. i have replaced the speed sensor in the diff with no luck. also the airbag light on the dash blinks 5 times ,then 1 time. any help on these issues is appreciated.

Answer
these should be two seperate problems-code 51 should be a short to ground in the airbag deployment circuit a short will have to be located and repaired if you replace the airbag module without finding and repairing short it will ruin another module-why did you replace diff sensor-i mean did you have it diagnosed there are several things that can turn either light on.