I have a Schumacher se-4020 both of my clamps fell off and I need to know which is negitive and posative can u help ???

See the link

https://www.google.com/search?q=Schumacher+SE-5212-CA+wiring+diagram

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Question edited for clarity.
Question moved to Schumacher category.

The AI Chat GPT4 answer has been deleted.

Schumacher have a great Support system and in most cases the manuals have the wiring diagram at the back.

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Nope, it is 'Schumacher', not a 'Schumer'. Corrected.
Question moved from 'Health and Beauty' to a better category.

If you can spell it, you can Google it :>D

https://www.google.com/search?q=schumacher+se-40map+wiring+diagram

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Get a volt meter and hook up the test probes to the cable ends and turn the meter on, the meter will say 12 or -12 if it says 12 then you have the red and black from the meter connected to the red and black on the charger in the right manner, if it says -12 then you have them reversed. Take the cable clamps and put them back on.

Your battery charger supplier or manufacturer should be able to supply you with an operating manual.

try this web site

http://www.manualslib.com/manual/523935/Schumacher-Se-2254.html Schumacher SE 2254 Owner Manual

replace

Haynes or Chilton manual

I would check Mcmaster Carr online and search for part # 7178K14. This is a pair of 200 amp clamps for around $8.00. I use this business all the time. They ship really really fast. Good luck

Century Tool and Equipment. $3.99

http://www.centurytool.net/SE_2158_Schumacher_Battery_Charger_Parts_List_s/30946.htm