GMC 1976 ZEO 6083 Maintenance Manual page 776

24G- 1 4 FURNACE
19).
3 . Connect hi tension cable to spark electrode.
4. Install furnace in outer casing (See figure 19).
5 . Install wiring access cover (figure 18) .
6. Install furnace in vehicle. See "Furnace Re-
placement" earlier in this section.
CONTROL BOX REPLACEMENT
REMOVAL
NOTE:
If a malfunction occurs in one or more of
the relays in the control box (See figure 22) it is
to be replaced as an assembly .
1 . Remove furnace from vehicle. See "Furnace
Replacement" earlier in this section .
2. Remove wiring access cover (figure 18).
3. Remove furnace from outer casing (See figure
4. Disconnect all external electrical wires from
control box. Note the number identification on
wires, to aid in correct installation, later.
1 5 . Remove two control box mounting screws (See
figure 23).
6. Remove control box.
INSTALLATION
1 . Position control box as shown
in
Figure 23 .
Install two control box mounting screws .
Figure 22-Control Box (Cover Removed)
Figure 23-Removing Control Box
2. Connect electrical wires to control box.
3. Install furnace in outer casing (See figure 19).
4. Install wiring access cover (See figure 19).
5. Install furnace in vehicle. See "Furnace Re-
placement" earlier in this section.
BLOWER REPLACEMENT
REMOVAL
1 . Remove furnace from vehicle. See "Furnace
Replacement" earlier in this section.
2. Remove wiring access cover (figure 18).
Figure 24-Removing Straps from Furnace