72ray

72ray
Casual User
Aug 7, 2018
80
68
Awards
2
Sydney Australia
VetteCoins
1,761
Car
1972 coupe 350 TH400
Hi legends,
I’m sure somebody here can IDENTIFY and EXPLAIN this electrical connection that joins my
a/c compressor +ve power supply (dark green) what the wiring diagram I have says is the low pressure switch. Apologies for my electrical ignorance in advance.
 

Attachments

  • iOS Image - 368180808.jpg
    iOS Image - 368180808.jpg
    346.3 KB · Views: 27
  • iOS Image - 2379098448.jpg
    iOS Image - 2379098448.jpg
    340.5 KB · Views: 26

Cadder61

Casual User
Jun 20, 2018
42
58
VetteCoins
878
Car
1975 CORVETTE L82
Took me a few minutes to recognize it (haven't seen one since my parts-guy days 20 years ago ) but that is a thermal limiter fuse. Paraphrasing a bit, but when there is improper refrigerant flow, causing too high a temp, the normally open pressure switch will close and send current to this fuse which then melts and opens the clutch circuit. GM has not used them since late 70's.
 
  • Informative
  • Like
Reactions: 72ray and ddgermann

72ray

72ray
Casual User
Aug 7, 2018
80
68
Awards
2
Sydney Australia
VetteCoins
1,761
Car
1972 coupe 350 TH400
Cool, That makes some sense as it was hanging off an a/c pipe. So if I put a meter on it there should be continuity between all three posts?
 

Cadder61

Casual User
Jun 20, 2018
42
58
VetteCoins
878
Car
1975 CORVETTE L82
Not a hundred per cent sure about all three but if it is not melted internally, there should be continuity across at least two of them.
 
  • Like
Reactions: 72ray

Users who are viewing this thread