User's Manual

Electrical Tests

313227C 23

Test Gun Resistance

Measure resistance between the turbine air inlet fitting

(TA) and the charging probe socket (CC) (see F

IG. 17); it

should be 70-95 megohms. If outside this range, check

the power supply and barrel resistance. If in range, test

the charging probe resistance.

Test Charging Probe Resistance

Measure resistance between the metal spring in the

charging probe (DD) and the charging probe tip (BB)

(see F

IG. 17); it should be 15-30 megohms. If outside

this range, replace the charging probe. If in range,

inspect the spring and barrel socket for possible causes

of poor continuity. Reassemble the charging probe and

retest the gun resistance.

FIG. 17. Test Gun Resistance

ti13449a

FIG. 18. Test Charging Probe Resistance

ti13732