Having problems with your 1994 Jeep Grand Cherokee ?

Put a new alternantor in 2 summers ago. Only drive in summer, son in collegs. Had a dead battery today. The auto store said the alternantor was bad.

Posted / edited by AnonymousUser on : 18-06-2018

Answers :

If you are not using the vehicle except during the summer, You should really have a battery tender (2amp automatic charger) attached to it. There are normal items that will otherwise drain the battery over an extended period of time (radio and clock to mention one). If you jump started it when you found the battery to be dead, it's possible to have the alternator fail as it cannot charge a dead battery
(alternators are designed to maintain the state of charge, not re-charge. If "requested" to re-charge they will run full on and eventually burn out).
Auto stores often do not have experienced help. Therefore, it's possible that your alternator may still be OK. First, completely re-charge the battery and have it load tested to make sure it's good. Then, do a quick check using a volt meter. Running voltage measured at the battery terminals should be between 13 and 14 volts. You should see a drop with all accessories on including headlights on high, but the voltage should not creep downward even after fifteen minutes. If after running, you start seeing numbers below 12.9 the alternator or regulator is bad. (regulator is part of the computer so hopefully it's not bad).
Good luck!!
Repair Help & Product Troubleshooting for 1994 Jeep Grand Cherokee

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