03DelcoRemy Diagnostic Manual130004222020

delcoremy.com Page 23 5-2. OVERCRANK PROTECTION (OCP) CIRCUIT CHECK To check the thermostat in the OCP circuit for continuity, detach wiring harness connector and connect an ohmmeter to the two thermostat terminals on the starter. The ohmmeter should read zero. If not, thermostat is open circuit and the starter should be replaced prior to proceeding with other tests in this booklet. DO NOT check thermostat when hot since it is supposed to be open circuit above certain temperatures. 5-3. MULTI-BATTERY CHARGING WITH SERIES AND PARALLEL CHARGERS These procedures assist in providing charged batteries for future service. However, “boost” charging or “fast” charging is not covered. Below are basic guidelines for charging groups of batteries and supplements information contained in the Delco Service Bulletins, 1B-115 and 1B-116. The two types of battery chargers in use today for charging a group of batteries are: • Current-limiting (often called Constant – Current or Series Chargers) • Voltage-limiting (often called Constant – Voltage or Parallel Chargers) With current-limiting, the batteries are connected so that each battery receives the same amount of charging current. (See Fig. 1 for typical hook-up.) With voltage-limiting, the batteries are connected so that the charging current is divided and each battery receives only the charging current it can accept at the charger’s voltage. (See Fig. 2 for typical hook-up.) Because of these differences, the charging procedures also differ. No matter which type of charger is used, differences exist among batteries: age, capacity, size, state of charge, and type. These differences mean that time and attention must be given to batteries during the group-charging process. CHARGER A V V V V TEST VOLTMETER DP-1030 A CHARGER AMMETER FIGURE 1. A V V TEST VOLTMETER DP-1031 A CHARGER AMMETER FIGURE 2. Connect to same ground point as standard circuit (may be through relay or fuel pressure switch) Thermostat Leads (2) Motor Thermostat Connections DP-1029 DELCO REMY STARTERSWITH OVERCRANK PROTECTION