Ford — Starter Cranking Circuit Test
Testing & diagnosis · Starting system
From a Ford service manual covering: 140 CID, 2.3 LITRE, 2300 cc, LSG-423. Check it applies to your exact model before use.
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Procedure
- Make test connections as shown; crank engine with ignition OFF.
- Disconnect and ground high tension lead from ignition coil.
- Connect jumper from battery terminal of starter relay to S terminal of relay.
- Check voltage drop with voltmeter on 0 to 2 volt range.
- Maximum allowable voltage drop: 0.5 volt battery positive to starter terminal.
- 0.1 volt battery positive to battery terminal of starter relay.
- 0.3 volt battery positive to starter terminal of starter relay.
- 0.1 volt engine ground to negative battery terminal.
Tools required
- Voltmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Maximum allowable voltage drops: 0.5, 0.1, 0.3, 0.1 volt
Source: Ford service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.